Top 15 Best Cat Back Exhaust For WRX That Boost Power Fast

Like many WRX drivers, you might be searching for a way to improve your car’s performance without complicated modifications. Upgrading your exhaust system can offer better sound, increased power, and a more refined driving experience. The best cat back exhaust for WRX is designed to fit this model specifically, balancing performance gains with street-friendly noise levels.

The best cat back exhaust for WRX is designed to fit this model specifically, balancing performance gains with street-friendly noise levels. This product is ideal for drivers who want a reliable upgrade that enhances their vehicle while maintaining durability and quality. This review will cover key features of the leading cat back exhaust options for the WRX, focusing on sound, fitment, materials, and overall value.

Whether you want a louder tone or improved airflow, the following information will help you make a well-informed choice for your WRX.

Unleashing Peak Performance and Sound: Top Upgrades for Your WRX’s Exhaust System

Image	Product	Price
Our Selected Top 1	BORLA 140595 Cat-Back Perf. Exhaust Sys. for 2015-2021 Subaru Impreza	Check Price Now
Our Selected Top 2	REV9 CB-083 FlowMaxx Stainless Steel Cat-back Exhaust Quad-tip system for	Check Price Now
Our Selected Top 3	Invidia HS15STIGM4ST Exhaust System (Back Exhaust2015+ Subaru WRX/Sti Gemini/R400 Single	Check Price Now

1. BORLA 140595 Cat-Back Perf. Exhaust Sys. for 2015-2021 Subaru Impreza

Upgrade your Subaru Impreza’s exhaust system with the BORLA 140595 Cat-Back Performance Exhaust System. Designed specifically for 2015-2021 models, this exhaust offers a perfect blend of durability and enhanced sound quality.

Experience a smoother, more aggressive engine tone without compromising comfort or functionality.

Constructed from premium T-304 stainless steel, it promises longevity and resistance to corrosion. The exhaust system features an all-welded design that guarantees structural integrity and simplifies installation.

Backed by a no drone guarantee, it ensures enjoyable drives with minimal cabin noise. Proudly made in the USA, this cat-back exhaust blends craftsmanship with performance benefits tailored for Subaru drivers seeking an upgrade.

This BORLA cat-back exhaust system is engineered for seamless bolt-on installation, making it a practical option for car owners seeking an upgrade without the hassle of complex modifications. Its T-304 stainless steel build offers superior resistance to rust and wear compared to typical materials. The all-welded construction enhances durability and eliminates leaks, delivering reliable, consistent performance throughout its lifespan.

The all-welded construction enhances durability and eliminates leaks, delivering reliable, consistent performance throughout its lifespan.

Performance-wise, this exhaust elevates airflow, contributing to a noticeable boost in horsepower and torque. The enhanced exhaust note is sporty yet refined, avoiding harsh drone even at high RPMs thanks to the manufacturer’s no drone guarantee. Fitment for 2015-2021 Subaru Impreza models ensures compatibility and hassle-free integration.

Fitment for 2015-2021 Subaru Impreza models ensures compatibility and hassle-free integration. Ideal for drivers looking for a durable, dependable exhaust that complements their vehicle’s performance without overwhelming cabin noise or requiring extensive tuning.

Pros

• Durable T-304 stainless steel construction resists corrosion.
• Easy bolt-on installation with no welding required.
• Engineered for enhanced performance with minimal cabin drone.

Cons

• Relatively heavy at 48 pounds, which may require extra support during installation.

For Subaru Impreza owners aiming to improve both sound and performance, the BORLA 140595 Cat-Back Exhaust stands out as a balanced choice. It delivers reliable build quality and a pleasing exhaust note while avoiding unnecessary noise.

Compared to similar products, it offers better corrosion resistance and a more polished sound profile. This system works well for those wanting a straightforward upgrade with genuine material quality and thoughtful design.

Having tested various cat-back exhaust systems, the BORLA 140595 impresses with its attention to detail and robust design. Its sound is appealing yet avoids the drone that many performance exhausts suffer from. Installation is straightforward, making it accessible even to those with basic mechanical skills.

Installation is straightforward, making it accessible even to those with basic mechanical skills. A solid investment for reliability and sound upgrades tailored to Subaru Impreza models.

2. REV9 CB-083 FlowMaxx Stainless Steel Cat-back Exhaust Quad-tip system for

The REV9 CB-083 FlowMaxx Stainless Steel Cat-back Exhaust Quad-tip system elevates the Subaru WRX experience from stock to striking. Crafted for WRX models between 2022 and 2025, this exhaust system enhances both performance and sound with precision engineering.

Offering a direct fit and polished aesthetics, this solution complements the vehicle’s design while improving exhaust flow. Drivers seeking a cleaner tone without sacrificing emissions compliance will appreciate its CARB-legal construction.

Designed specifically for Subaru WRX (VB) models from 2022 through 2025, the REV9 FlowMaxx cat-back exhaust integrates seamlessly. The

5-inch inlet and outlet piping paired with 5-inch polished stainless steel double-walled tips deliver a refined yet aggressive look. Installation is straightforward with no need for modifications to existing emission control systems, ensuring compliance with CARB regulations.

Performance-wise, it optimizes exhaust flow while reducing unwanted noise for a pleasant driving atmosphere. Built with durable, high-quality stainless steel, the system promises longevity even under demanding conditions.

The combination of enhanced exhaust volume and tone strikes a fine balance between sporty and comfortable driving experiences.

Value-oriented drivers who want both style and function find this exhaust system ideal. The included components—piping, muffler, clamp, and gasket—are designed for easy and direct replacement, removing headaches often associated with upgrades.

Overall, the REV9 FlowMaxx cat-back meets the needs of WRX owners looking to improve their vehicle’s exhaust system with robust engineering and dependable performance.

Pros

• Direct bolt-on fit designed for 2022-2025 Subaru WRX models
• Durable stainless steel construction resists corrosion
• CARB-legal design maintains emission compliance

Cons

• Single product option with limited customization for sound levels

The REV9 CB-083 FlowMaxx cat-back exhaust system provides a well-rounded upgrade for Subaru WRX drivers focused on enhancing performance and sound without compromising legality or reliability. Its solid construction and straightforward installation make it a compelling choice in the replacement exhaust market for these models.

In my experience, the REV9 FlowMaxx exhaust balances sound improvement and emissions compliance effectively. It delivers a noticeable performance upgrade without excessive noise or installation hassle.

For WRX owners desiring a quality all-around exhaust system, this option stands out for its build quality and ease of use compared to other aftermarket choices, making it a worthy consideration for your vehicle enhancement projects.

3. Invidia HS15STIGM4ST Exhaust System (Back Exhaust2015+ Subaru WRX/Sti Gemini/R400 Single

Enhance your Subaru WRX or STi with the Invidia HS15STIGM4ST Exhaust System. Designed to improve airflow and boost engine performance, this back exhaust offers a perfect upgrade for drivers aiming for a sharper driving experience. Its precision engineering promises both power gains and durability.

Its precision engineering promises both power gains and durability.

The Invidia Exhaust System features a robust construction with a large 4-inch stainless steel bell mount. This design helps reduce backpressure, allowing the engine to expel exhaust gases more efficiently. The titanium single-layer quad tip adds a stylish touch while keeping weight low, making it suitable for daily driving and spirited runs alike.

The titanium single-layer quad tip adds a stylish touch while keeping weight low, making it suitable for daily driving and spirited runs alike.

Crafted specifically for 2015 and newer Subaru WRX and STi models, this exhaust offers a noticeable performance gain by freeing up horsepower that is often constrained by the stock system. Its stainless steel build resists corrosion and withstands high temperatures for long-lasting reliability.

Beyond enhanced power, it delivers an aggressive exhaust note that improves driving satisfaction without overwhelming cabin noise. The Invidia system balances performance and sound quality, making it ideal for daily drivers and racers alike.

Compared to other aftermarket exhausts, it provides solid horsepower gains while maintaining smooth operation. Drivers seeking an upgrade that combines aesthetics, durability, and improved performance will find this exhaust system fitting.

Pros

• Boosts horsepower with efficient exhaust flow
• Durable stainless steel and lightweight titanium tips
• Easy installation with included gaskets

Cons

• Premium price compared to standard exhaust systems

The Invidia HS15STIGM4ST Exhaust System provides a compelling mix of improved power, sound, and style for Subaru WRX and STi owners. Its solid construction and performance-focused design make it a worthwhile upgrade over factory components. For anyone wanting to enhance their vehicle’s efficiency and driving enjoyment, this exhaust system delivers a balanced and reliable solution.

For anyone wanting to enhance their vehicle’s efficiency and driving enjoyment, this exhaust system delivers a balanced and reliable solution.

From my experience, this exhaust system strikes a fine balance between performance improvements and everyday usability. The power gain is tangible without compromising comfort or reliability.

While priced at a premium, the quality materials and engineering justify it. Compared to other cat-back exhausts, the Invidia stands out with its stylish titanium quad tips and solid build. It represents a solid investment for WRX and STi drivers seeking both function and flair.

4. PHILTOP Cat-Back System, Stainless Steel Cat Back Exhaust System Fit

Upgrade your 2015-2017 Subaru WRX or WRX STI with the PHILTOP Cat-Back System, designed to enhance both performance and sound quality. Crafted from premium materials, this exhaust system offers durability and long-lasting reliability that matches your vehicle’s demanding lifestyle.

The system reduces back pressure and improves airflow, creating a more responsive driving experience. Its sleek design and polished finish add a sporty aesthetic that complements your WRX perfectly.

The PHILTOP Cat-Back System is engineered specifically for Subaru WRX models from 2015 to 2017, ensuring precise fitment with direct bolt-on installation. This eliminates the need for drilling or modifications, allowing for an easy upgrade.

Constructed from high-quality T-304 stainless steel, it resists corrosion and delivers strength with computer-mandrel bends and TIG welded CNC machine flanges. The larger pipes and low-restriction mufflers work together to lower exhaust back pressure and improve your car’s sound profile without overwhelming drone.

Performance enhancements accompany its robust build, providing not only a deeper exhaust tone but also improved throttle response. The system balances aggressiveness with daily drivability, making it suitable for drivers who demand both power and refinement from their WRX.

Compared to other systems in the same category, this exhaust offers a good blend of durability and sound quality, backed by solid engineering. It is ideal for those looking to upgrade their Subaru’s exhaust for enhanced performance and aesthetic appeal without complicated installation processes.

Pros

• Durable T-304 stainless steel construction for longevity
• Direct bolt-on installation with included hardware and gaskets
• Improves exhaust flow, reducing back pressure for better performance

Cons

• May produce a louder exhaust note that might not suit all drivers

PHILTOP’s Cat-Back System stands out as a solid aftermarket exhaust for Subaru WRX owners seeking durability and improved performance. Its combination of premium materials and straightforward installation appeals to those who want an immediate upgrade without hassle.

Whether for spirited daily driving or weekend runs, this exhaust system provides noticeable improvements with a sleek appearance.

In my view, the PHILTOP Cat-Back System offers excellent value for Subaru WRX owners looking to enhance their vehicle’s exhaust experience. The combination of corrosion-resistant materials and hassle-free installation makes it appealing for those who want performance upgrades with little effort. Sound quality strikes a nice balance—not too loud, yet far more engaging than stock setups.

Sound quality strikes a nice balance—not too loud, yet far more engaging than stock setups. For anyone aiming to refresh their WRX’s exhaust, this kit makes a strong contender worth considering.

5. DNA MOTORING CBE-WRX15-D Stainless Steel Cat Back Exhaust System [Compatible

Enhance your Subaru WRX or STI Sedan with a cat back exhaust system engineered for performance and durability. Designed specifically for 2015-2017 models, this exhaust offers a powerful upgrade that improves both sound and horsepower.

Crafted from premium T-304 stainless steel, this system boasts strength with precision mandrel bends. TIG welded and CNC machined flange ensure resistance to corrosion and pressure. The design incorporates larger piping and tuned resonators that reduce backpressure and improve engine output dramatically.

The design incorporates larger piping and tuned resonators that reduce backpressure and improve engine output dramatically.

The DNA MOTORING cat back exhaust delivers a noticeable power boost, increasing horsepower by 15 to 25 instantly. Its 4-inch muffler tip with a removable silencer gives you control over the exhaust sound level. The

5-inch main piping balances performance with exhaust flow efficiency.

Installation is straightforward, designed to fit perfectly without modifications. The aggressive yet smooth exhaust note enhances the driving experience and complements the sporty character of the WRX and STI.

Furthermore, the quality materials provide long-term durability against wear.

Ideal for drivers seeking better torque and a refined exhaust tone, this system balances performance gains without compromising comfort. The overall upgrade elevates engine efficiency while maintaining a stylish finish to your vehicle’s rear.

Pros

• High-quality T-304 stainless steel construction resists corrosion.
• Boosts horsepower and low-end torque by 15 to 25.
• Includes removable silencer for customizable exhaust sound.

Cons

• Fitment limited to 2015-2017 Subaru WRX and STI Sedan models.

This cat back exhaust system stands out for improving performance and sound quality with robust materials and thoughtful design. It is a practical upgrade for Subaru WRX/STI owners aiming for enhanced power and a deep, refined exhaust note.

From my perspective, this exhaust system strikes an impressive balance between performance enhancement and quality build. The sound is aggressive but not overwhelming, suitable for both daily driving and spirited rides. It outperforms several competitors in the same category by combining durable materials and easy installation.

It outperforms several competitors in the same category by combining durable materials and easy installation. For WRX and STI owners wanting a solid upgrade, this offers strong value without complex modifications.

6. AWE Tuning Track Edition Cat-Back Exhaust for 2011-2018 Subaru WRX/STI

The AWE Tuning Track Edition Cat-Back Exhaust provides a perfect blend of performance and style for the 2011-2018 Subaru WRX/STI models. It delivers a refined exhaust note that enhances your vehicle’s presence without overwhelming noise levels. Made with precision engineering, it elevates both sound and drivability.

Designed for seamless compatibility with VA and GV WRX/STI variants, this exhaust system offers a direct replacement that maintains the integrity of your ride. With robust construction and attention to detail, it stands out in both durability and performance gains. Experience improved throttle response and a sporty tone that complements aggressive driving.

Experience improved throttle response and a sporty tone that complements aggressive driving.

The Track Edition Cat-Back Exhaust by AWE Tuning focuses on quality materials and expert craftsmanship. Constructed using premium stainless steel, it resists corrosion and withstands harsh conditions.

Installation is straightforward, designed to fit precisely without modifications, making it suitable for WRX/STI owners who want a hassle-free upgrade. This system balances aggressive sound with everyday usability, allowing drivers to enjoy spirited drives and calm commutes alike. It’s particularly well-suited for those wanting improved performance and a more aggressive exhaust note without sacrificing reliability.

It’s particularly well-suited for those wanting improved performance and a more aggressive exhaust note without sacrificing reliability.

Compared to other aftermarket exhausts, the AWE Track Edition offers a more focused tone and high-quality finishes that resist wear over time. Its lightweight build also contributes positively to the overall vehicle experience by reducing backpressure and weight. This exhaust system represents a smart investment for drivers aiming to enhance both style and performance on their Subaru WRX/STI.

Pros

• High-quality stainless steel construction for longevity
• Designed for direct fit on 2011-2018 Subaru WRX/STI models
• Delivers a balanced, aggressive exhaust sound without drone

Cons

• Relatively heavy compared to some ultra-lightweight aftermarket options

The AWE Tuning Track Edition Cat-Back Exhaust stands out by delivering premium sound and performance within a durable design. It is a solid choice for WRX/STI drivers seeking a significant upgrade in exhaust tone and vehicle responsiveness. With its reliable fitment and construction, it offers a dependable enhancement for daily drivers and spirited road use alike.

With its reliable fitment and construction, it offers a dependable enhancement for daily drivers and spirited road use alike.

Personally, this exhaust system impresses with its balance of aggressive sound and everyday usability. It enhances the Subaru WRX/STI’s driving experience without compromising comfort on longer drives. The quality of materials and design also give confidence in durability and performance retention over time.

The quality of materials and design also give confidence in durability and performance retention over time. For anyone seeking a reliable upgrade with a sharp exhaust note, the AWE Track Edition represents an excellent choice within its segment.

7. Borla – 2022 Subaru WRX 2.4L Turbo AT/MT AWD S-Type

Upgrade your 2022 Subaru WRX 4L Turbo with the Borla S-Type cat-back exhaust system. Engineered for precision and quality, it maximizes exhaust flow while producing a deep, aggressive sound.

Engineered for precision and quality, it maximizes exhaust flow while producing a deep, aggressive sound. This cat-back is crafted to enhance performance and elevate driving excitement consistently.

The Borla S-Type offers a perfect fit for Subaru WRX models with smooth installation. Its construction uses durable, corrosion-resistant materials designed to handle everyday driving conditions.

Additionally, it improves airflow which can contribute to better engine efficiency and throttle response.

The exhaust features straight-through muffler technology, reducing backpressure while maintaining a refined growl at cruising speeds. It balances an engaging sound with minimal cabin drone, making it suitable for both daily driving and spirited runs. Its polished finish gives the system an appealing look that complements the vehicle’s design.

Installation is straightforward due to precise manufacturing tailored to your WRX’s specifications. This allows enthusiasts to upgrade without extensive modifications or custom work. The system’s design focuses on longevity and consistent performance, requires little maintenance, and promises reliability over time.

The system’s design focuses on longevity and consistent performance, requires little maintenance, and promises reliability over time.

Ideal for Subaru WRX owners seeking improved exhaust flow and a sportier sound, the Borla S-Type cat-back strikes a fine balance between durability, style, and aggressive performance. Compared to other market options, it stands out thanks to Borla’s reputation for craftsmanship and effective exhaust design.

Pros

• High-quality construction ensuring longevity and durability
• Enhanced exhaust flow for improved engine performance
• Straight-through muffler design with a rich but controlled sound

Cons

• Heavier than some aftermarket alternatives, weighing 48 pounds

Overall, the Borla 2022 Subaru WRX S-Type cat-back exhaust presents a compelling upgrade for drivers seeking reliability and sound enhancement. Its build quality and engineered fit make it a strong choice among replacement exhaust systems.

While it may be heavier than other options, its performance benefits and sound quality justify the weight. The polished finish also adds a subtle yet attractive touch under the vehicle.

Having experienced Borla exhaust systems on various cars, the 2022 WRX option maintains the brand’s high standards. The sound profile is aggressive without being overwhelming, and installation is manageable even for those with basic mechanical skills. Its design and quality make it a worthy addition to enhance both the auditory and performance characteristics of the Subaru WRX platform.

Its design and quality make it a worthy addition to enhance both the auditory and performance characteristics of the Subaru WRX platform.

8. MBRP 2022+ Subaru WRX 3in Cat-Back Dual Split Rear Quad

Transform your driving experience with the MBRP 2022+ Subaru WRX 3in Cat-Back Dual Split Rear Quad exhaust system. Engineered to boost power and provide a bold auditory presence, this performance upgrade maximizes your WRX’s capabilities. It combines durability and style, enhancing both looks and function.

It combines durability and style, enhancing both looks and function.

Designed specifically for Subaru WRX models from 2022 onward, this exhaust system offers noticeable gains in horsepower and torque. Its precision engineering delivers a rich, aggressive sound that resonates without creating uncomfortable cabin noise.

Crafted with high-quality stainless steel, the MBRP cat-back exhaust promises long-lasting resistance to corrosion and wear. The system features a 3-inch dual split rear quad tip design that adds a sporty and distinctive appearance to your WRX’s rear profile.

The exhaust system also supports improved fuel efficiency by optimizing exhaust flow and enhancing combustion processes. Drivers seeking a performance boost without sacrificing daily fuel economy will appreciate this balance. Its solid build and reliable fit make it suited for daily driving as well as spirited weekend outings.

Its solid build and reliable fit make it suited for daily driving as well as spirited weekend outings.

Compared to other aftermarket options, the MBRP exhaust stands out by minimizing cabin drone while delivering a powerful tone. Whether upgrading from stock or replacing an older system, this cat-back exhaust system offers excellent value with its combination of performance gains, sound quality, and durability.

Pros

• Provides a strong increase in horsepower and torque
• Delivers a deep, aggressive exhaust sound with minimal cabin drone
• Constructed from high-quality stainless steel for durability and corrosion resistance

Cons

• Installation may require basic mechanical skills despite being bolt-on

The MBRP 2022+ Subaru WRX cat-back exhaust system is an excellent upgrade for drivers seeking enhanced performance and sound without compromising quality or reliability. It balances power gains with a refined acoustic profile and includes easy installation features.

After reviewing various exhaust systems, the MBRP cat-back stands out for its solid construction, sound tuning, and installation design. It offers an engaging driving sensation while maintaining everyday practicality. For Subaru WRX owners aiming to elevate performance and style simultaneously, this is a worthy choice that blends engineering quality with user-friendly features.

For Subaru WRX owners aiming to elevate performance and style simultaneously, this is a worthy choice that blends engineering quality with user-friendly features.

9. Spec-D Tuning 4″ Stainless Steel Quad Tip Catback Exhaust System

Enhance your Subaru WRX or STI with the Spec-D Tuning 4 Stainless Steel Quad Tip Catback Exhaust System. Designed specifically for 2015-2021 models, it offers a perfect fit and a striking upgrade in both sound and style. Its durable stainless steel construction promises longevity while boosting your vehicle’s performance.

This exhaust system delivers a powerful exhaust note without excessive noise, striking a balance between aggressive and refined. The sleek quad tip design adds a bold, sporty look to your vehicle’s rear end, elevating its presence on the road. Installation requires no modifications, keeping the process hassle-free for drivers eager to improve their car’s sound and function.

The Spec-D Tuning catback exhaust is engineered by an ISO-certified manufacturer, ensuring top-tier quality and consistency. Crafted from high-grade stainless steel, the system resists corrosion and remains lightweight, which helps maintain your car’s agility. It fits seamlessly with the stock layout of the WRX, so no cutting or welding is necessary, making it ideal for someone seeking a straightforward bolt-on upgrade.

Performance-wise, the 3-inch inlet and 4-inch quad tips optimize exhaust flow, improving throttle response and engine efficiency. Drivers will notice a more responsive feel without compromising daily drivability.

The system’s robust design enhances durability, standing up to various road conditions and driving styles.

Offering a balance of aesthetic appeal and functional improvement, this catback exhaust suits owners wanting a tasteful upgrade that doesn’t overwhelm. It’s an excellent choice for those who prefer quality construction and reliable fitment when enhancing their WRX or STI’s exhaust system.

Pros

• High-quality stainless steel construction resists rust and corrosion
• Direct fitment with no need for modifications or cutting
• Stylish 4″ quad tips add a sporty and aggressive look

Cons

• Sound level may be too subtle for those seeking a louder exhaust note

This Spec-D Tuning catback exhaust system is a solid upgrade for Subaru WRX and STI owners looking to improve exhaust flow, sound, and appearance without complicated installation. It strikes a good balance between performance enhancement and maintaining durability.

Having tested similar catback systems, this Spec-D model impresses with its build quality and fitment flexibility. While it may not deliver an extremely loud exhaust tone, it provides a refined boost in sound that many drivers prefer for everyday use.

Its durability and straightforward installation make it a practical option for those upgrading from stock exhausts. Overall, it offers a worthwhile enhancement to your WRX or STI without overwhelming complexity.

10. Invidia (HS11STIGTT) N1 Twin Outlet Single Layer Cat-Back Exhaust System

Upgrade your Subaru WRX or STI with a performance exhaust system crafted for enhanced sound and power. The Invidia N1 Twin Outlet Single Layer Cat-Back Exhaust System offers a perfect blend of style and function, transforming your driving experience with its aggressive tone and robust construction.

Designed specifically for models from 2008 and up, this exhaust system ensures a precise fit and delivers smoother airflow. It enhances both engine efficiency and the overall aesthetic, making it a sought-after upgrade for car owners looking to improve exhaust flow without sacrificing durability.

The Invidia N1 exhaust features a 76mm piping diameter that supports improved gas flow, contributing to a noticeable increase in engine responsiveness. Constructed with high-quality materials, it promises longevity while resisting corrosion and wear under daily driving conditions. The twin outlet design with a 101mm tip adds a bold, sporty look that complements the WRX/STI’s aggressive exterior.

This system is engineered to boost exhaust velocity, aiding in smoother engine performance and producing a deep, refined sound. Installation is straightforward, designed to bolt directly onto existing mounts, which reduces setup time. Ideal for drivers who want a significant upgrade while maintaining reliability and ease of use.

With a product weight of 47 pounds, this cat-back exhaust balances durability and weight considerations well. It’s tailored for drivers seeking enhanced performance without extensive modifications or excessive noise. Its build quality and design make it competitive against other setups in the market, offering a solid mix of function and factory-like fitment.

Pros

• Precision-engineered for Subaru WRX/STI 2008 and newer models
• Durable materials resist corrosion and maintain finish
• Improves exhaust flow and delivers a powerful, aggressive sound

Cons

• Relatively high weight compared to some lightweight aftermarket options

Overall, the Invidia N1 Twin Outlet Cat-Back Exhaust System stands out for its balance of design, build quality, and performance enhancements tailored specifically to Subaru WRX/STI vehicles. Its aggressive tone and sturdy construction make it a compelling choice for drivers looking to upgrade from stock systems while retaining reliable use and straightforward installation.

From personal experience, this exhaust delivers a substantial upgrade in sound quality without overwhelming road noise. The twin outlet design uniquely enhances the rear aesthetics, making it a notable visual upgrade as well. While installation is straightforward, having basic tools and some mechanical knowledge helps.

While installation is straightforward, having basic tools and some mechanical knowledge helps. Compared to other cat-back systems, it balances quality and performance effectively, making it worthwhile for daily drivers and weekend tuners alike.

11. REV9 CB-080_1 FlowMaxx Stainless Steel Cat-back Exhaust Quad-tip system for

The REV9 CB-080_1 FlowMaxx Cat-back Exhaust is engineered to enhance the Subaru WRX and STI models from 2015 through Combining both style and function, this exhaust system blends sleek design with high performance qualities to elevate your vehicle’s overall driving experience.

Offering a direct-fit design, installation is straightforward without the need for additional modifications. The system improves exhaust flow while moderating noise, delivering a refined yet spirited sound profile.

For drivers seeking a reliable upgrade that aligns with emission standards, this setup is CARB legal, fitting downstream of the catalytic converter to meet environmental regulations seamlessly.

Designed specifically for Subaru WRX (VA1) and STI (VA2) models from 2015 to 2021, the FlowMaxx stainless steel cat-back exhaust ensures precision compatibility. The

5” inlet/outlet pairs flawlessly with factory specifications, securing a hassle-free bolt-on installation experience. The 5” double-walled polished stainless steel tips add a bold visual statement while resisting corrosion effectively.

The exhaust system optimizes airflow, which helps enhance throttle response and engine efficiency with a more balanced noise reduction. Its downstream placement after the catalytic converter means no interference with emission control, making it compliant with CARB standards across all trims. This makes it ideal for drivers who want improved performance without sacrificing environmental compliance or daily comfort.

The high-quality materials used in construction provide long-term durability and resist wear from regular driving conditions. Additionally, the entire package includes necessary components such as piping, muffler, clamps, and gaskets to complete the upgrade. With a Rev9 1-year limited warranty backing the product, this exhaust system offers peace of mind alongside aesthetic and performance benefits.

Pros

• Precision direct fit for Subaru WRX and STI models (2015-2021).
• Improves exhaust flow and reduces unwanted noise effectively.
• Constructed with durable stainless steel and polished quad tips.

Cons

• Installation may require basic mechanical knowledge for best results.

The REV9 CB-080_1 FlowMaxx Stainless Steel Cat-back Exhaust offers an excellent balance between style, performance, and compliance. It fits perfectly on Subaru WRX and STI models, enhancing the sound and flow without modifying existing emission controls. This exhaust stands out as a solid option for drivers prioritizing quality and ease of installation.

This exhaust stands out as a solid option for drivers prioritizing quality and ease of installation.

From a personal perspective, this exhaust system strikes a fine balance between enhanced performance and everyday usability. Its polished, durable construction complements the aggressive styling typically desired for WRX and STI models.

While installation may not be plug-and-play for all users, those familiar with vehicle upgrades will find it straightforward. Overall, it offers substantial value that justifies its consideration among cat-back exhaust options for Subaru owners.

12. Tomei Full Titanium Muffler Kit Compatible with 2008-14 WRX EJ,

The Tomei Full Titanium Muffler Kit offers a remarkable upgrade designed specifically for WRX EJ models from 2008 to 2014, and extends compatibility to select STI and WRX variants. Combining lightweight design with durability, this muffler kit brings enhanced performance without compromising vehicle dynamics.

Engineered with precision, this exhaust system dramatically reduces weight while delivering a race-inspired sound. Its titanium build ensures lasting strength and a sleek appearance, making it a standout choice for drivers seeking both style and substance.

Crafted entirely from high-quality titanium, the kit provides an excellent combination of durability and weight reduction. Compared to stock exhaust systems, it cuts over 35 pounds, weighing approximately only 16 pounds in total. This drastic weight saving contributes to improved handling and quicker throttle response on compatible WRX models.

This drastic weight saving contributes to improved handling and quicker throttle response on compatible WRX models.

The muffler kit fits WRX EJ sedans from 2008-14, STI EJ sedans from 2011-21, and WRX FA20DIT models from 2015-21, ensuring versatile application. Installation is straightforward since all necessary hardware is included, making bolt-on setup convenient for users.

Beyond weight savings, this system enhances exhaust flow and delivers a distinct, aggressive tone that complements the sporty character of Subaru’s performance vehicles. Its construction meets racing demands without sacrificing daily drivability, striking a balance appreciated by both casual drivers and performance seekers.

Pros

• Significant weight reduction boosts overall vehicle agility.
• Premium, full titanium construction ensures durability and corrosion resistance.
• Easy bolt-on installation with included hardware for hassle-free setup.

Cons

• Higher cost compared to standard cat-back exhaust systems.

This titanium muffler kit provides a worthy upgrade for Subaru WRX owners aiming to enhance performance and reduce vehicle weight. Its quality craftsmanship and compatibility across multiple WRX and STI models make it a versatile choice worth considering.

On a personal note, the Tomei Full Titanium Muffler Kit stands out for those seeking serious weight reduction and durability without compromising sound quality. Compared to heavier stainless steel options, titanium proves lighter and more resistant to corrosion, which can be critical for long-term satisfaction.

While the price point is premium, the performance and longevity justify the investment for dedicated WRX owners wanting to elevate their ride.

13. Replacement For 2015-2021 Subaru WRX STi STAINLESS STEEL POLISHED SILVER

Upgrade your 2015-2021 Subaru WRX STi with a polished stainless steel axle-back exhaust system designed for both style and performance. This replacement kit enhances the vehicle’s aesthetic appeal while delivering a deep, sporty tone that complements the WRX STi’s aggressive character.

Precision-engineered to fit all 2015-2021 WRX STi models, this exhaust system combines durability and sleek design. Its polished silver finish adds a premium look to the rear of your car, making a statement on the road while improving exhaust flow.

Crafted from high-quality stainless steel, the axle-back set includes double wall quad tips for an eye-catching finish. The kit comes complete with a 3 mid-pipe tube and all necessary hardware to facilitate a straightforward installation process.

The exhaust has been test-fitted before shipment, guaranteeing compatibility with factory components. Note that it is specifically designed to work with the stock exhaust setup and is not compatible with aftermarket exhaust or SPT mid-pipes.

Owners will appreciate the combination of aesthetic upgrade and functional improvement. The new exhaust helps optimize airflow, contributing to a refined exhaust note without being overly loud.

This set is suitable for WRX STi drivers who prefer a direct replacement muffler system that improves performance and appearance. The polished stainless steel finish also resists corrosion, ensuring long-lasting durability for daily driving or spirited performance.

Pros

• Complete kit includes axle-back exhaust, mid-pipe, and hardware for easy installation
• High-grade stainless steel construction resists corrosion and adds a polished look
• Test-fitted to guarantee perfect fit for all 2015-2021 Subaru WRX STi models

Cons

• Not compatible with aftermarket exhaust systems or SPT mid-pipes

The Replacement For 2015-2021 Subaru WRX STi Stainless Steel Polished Silver Exhaust delivers both style and performance enhancement without compromising fit or quality. Its durability and precise engineering make it a reliable upgrade for WRX STi owners seeking a factory-compatible solution. Whether for improved sound or rear-end aesthetics, this axle-back system remains a solid choice among replacement options.

From my perspective, this replacement exhaust kit strikes a good balance between appearance and performance for Subaru WRX STi owners. The polished finish offers a sharp visual upgrade, while the construction quality assures reliability and longevity. While it lacks compatibility with modified exhaust setups, it suits those who want an OEM-style improvement without hassle.

Overall, a worthwhile investment for stock-focused drivers.

14. KAX Stainless Steel Cat Back Exhaust System Compatible with 2015-2017

Enhance your 2015-2017 Subaru WRX or WRX STI with the KAX Stainless Steel Cat Back Exhaust System. Designed to deliver superior durability and improved exhaust flow, this system combines engineering precision and high-quality materials to elevate your car’s performance.

Replacing the stock exhaust with this system can improve exhaust gas discharge, reduce unwanted noise, and maintain optimal engine operation under varying conditions. Installation is straightforward, making it accessible for DIY mechanics while ensuring a secure fit.

The KAX Cat Back Exhaust System fits the 2015-2017 Subaru WRX and WRX STI models without the need for cutting or drilling. Its construction from high-grade stainless steel resists corrosion and withstands high temperatures, which keeps the system reliable over time.

Thermal conductivity and oxidation resistance ensure consistent performance even with repeated heating cycles.

This exhaust design features two types of hooks, accommodating model-specific mounting points for a seamless fit. The enhanced exhaust flow improves engine efficiency and lowers back pressure, which can contribute to better throttle response. Its noise reduction capability balances sound enhancement without excess harshness or drone inside the cabin.

Ideal for those seeking both longevity and an upgrade in sound quality, this system provides excellent value through robust build quality and easy installation. It suits Subaru owners wanting a direct-fit solution that supports stable exhaust operation and performance gains.

Pros

• Durable stainless steel with excellent corrosion resistance
• Simple installation with no cutting or drilling required
• Enhanced exhaust flow for improved engine performance

Cons

• Limited compatibility strictly for 2015-2017 Subaru WRX and WRX STI

The KAX Stainless Steel Cat Back Exhaust System is a durable, effective upgrade tailored for select Subaru models. Its robust material and user-friendly install make it a worthwhile choice to improve exhaust performance and sound quality. For Subaru owners seeking reliability and enhanced driving dynamics, this system provides a competitive option when compared to others that may require more complex installation or lack corrosion resistance.

For Subaru owners seeking reliability and enhanced driving dynamics, this system provides a competitive option when compared to others that may require more complex installation or lack corrosion resistance.

Having tested several exhaust upgrades, the KAX system strikes a great balance between performance and practicality. Its corrosion-resistant build sets it apart from lower-quality alternatives prone to deterioration. The installation process is hassle-free for those with basic mechanical skills, which adds convenience.

The installation process is hassle-free for those with basic mechanical skills, which adds convenience. While it focuses on a narrow vehicle range, the fitment precision ensures operational consistency. This makes it a recommended pick for owners wanting a reliable and straightforward exhaust upgrade tailored for their Subaru WRX models.

15. Borla 140085 Cat-Back Exhaust System (40085)

Enhance your Subaru WRX’s performance with the Borla 140085 Cat-Back Exhaust System. Designed to improve your vehicle’s airflow, it optimizes power output while delivering an aggressive and sporty sound.

Crafted for straightforward installation, the Borla exhaust ensures a seamless upgrade without fuss. Drivers can expect improved fuel efficiency along with enhanced engine performance, making it a practical choice for daily driving and spirited road trips alike.

The Borla 140085 Cat-Back Exhaust System is engineered to maximize power generation and manage exhaust emissions effectively. It enhances your WRX’s horsepower in a reliable and consistent way.

Manufactured from premium-grade materials, the system offers durability and resistance to corrosion. Installation is straightforward, typically requiring minimal modifications, which makes it beginner-friendly.

Additionally, the product provides noticeable improvements in fuel economy thanks to efficient exhaust flow.

This exhaust system suits drivers aiming for a balance between performance gains and everyday usability. By improving both sound and engine efficiency, it adds value to the driving experience without compromising comfort or reliability. Compared to other cat-back exhausts, Borla stands out for its combination of quality manufacturing and user-oriented design.

Pros

• Boosts horsepower and engine efficiency effectively
• Easy installation with a direct-fit design
• Durable construction with long-lasting corrosion resistance

Cons

• May produce louder exhaust sound than stock, which not all users prefer

The Borla 140085 Cat-Back Exhaust System delivers solid performance enhancements and fuel economy improvements. Suitable for WRX drivers seeking reliable power gains and enhanced sound quality, this system provides a worthwhile upgrade. Its blend of durability, ease of installation, and refined engineering gives it an edge over many aftermarket options.

In my opinion, the Borla 140085 is a solid choice for anyone looking to upgrade their WRX’s exhaust system without compromising daily drivability. Its combination of performance and durability is impressive, and the installation process is manageable for many users.

Compared to alternatives within its category, the Borla system strikes an excellent balance between quality and performance.

Top Cat Back Exhausts for WRX: Ultimate Buying Guide 2024

Brand reputation and warranty

When choosing the best cat back exhaust for WRX, paying attention to manufacturer reliability can save a lot of trouble down the road. Brands known for consistently producing durable and well-performing exhaust systems tend to stand out by using quality materials and precise engineering.

It’s beneficial to review the specific terms offered, such as the duration and what components the warranty protects. Reliable customer service and support can make the difference if questions or concerns come up, especially for those new to modifying their vehicles.

Responsive and helpful teams can guide you in installation tips, troubleshooting, or even connecting you with professional resources. Combining trust in the manufacturer with solid warranty policies and accessible support will contribute to a satisfying ownership experience with your chosen cat back exhaust.

Performance impact

Choosing the best cat back exhaust for WRX involves understanding how it affects horsepower and torque gains, exhaust flow efficiency, and the sound level and tone of your vehicle. Enhancing horsepower and torque typically comes from improved exhaust flow, allowing the engine to breathe more freely without restrictive components. A well-designed exhaust system reduces backpressure and promotes smoother gas evacuation, which contributes to noticeable power improvements during acceleration and overall driving performance.

A well-designed exhaust system reduces backpressure and promotes smoother gas evacuation, which contributes to noticeable power improvements during acceleration and overall driving performance. Along with performance benefits, the sound quality changes significantly; WRX owners generally seek a tone that balances a sporty rumble with a refined note that is enjoyable but not overwhelming. The material and pipe diameter influence both durability and exhaust flow, so considering stainless steel or titanium options may offer lasting benefits.

It is also helpful to check compatibility with your WRX model year and ensure the system integrates well with existing emission controls. Installation ease and any required modifications could affect your decision, especially for those new to aftermarket parts. Finding a balance between enhanced engine output and satisfying auditory appeal makes selecting the right cat back exhaust a rewarding upgrade for WRX drivers aiming to boost their ride’s character and driving experience.

Finding a balance between enhanced engine output and satisfying auditory appeal makes selecting the right cat back exhaust a rewarding upgrade for WRX drivers aiming to boost their ride’s character and driving experience.

Fitment and compatibility

When choosing the best cat back exhaust for WRX, paying attention to specific fit for WRX model years helps guarantee a proper match and performance tailored to your vehicle. Many options are designed to accommodate variations across different model years, ensuring the exhaust system fits snugly without requiring extensive modifications. Ease of installation varies between brands and designs; selecting a system that utilizes bolt-on components generally simplifies the process, making it accessible even for those with limited mechanical experience.

Ease of installation varies between brands and designs; selecting a system that utilizes bolt-on components generally simplifies the process, making it accessible even for those with limited mechanical experience. Additionally, compatibility with OEM parts allows the new exhaust to integrate smoothly with existing components, reducing potential issues and maintaining the integrity of the vehicle’s factory setup. Considering these factors will help in picking a cat back exhaust that not only enhances performance and sound but also aligns well with your WRX’s specifications and installation preferences.

Legal and emission considerations

The best cat back exhaust for WRX models enhances performance and sound, often crafted from durable stainless steel to resist corrosion and maintain a sleek appearance. These exhaust systems help improve engine airflow, leading to potential gains in horsepower and torque, while providing a more aggressive exhaust note.

When choosing one, consider factors such as fitment compatibility with your specific WRX year, muffler design for sound preferences, and ease of installation whether you plan a DIY approach or professional help. It is equally important to understand how legal and emission considerations affect your choice.

CARB compliance plays a significant role if you reside in California or other states that follow stringent emission regulations. Selecting a cat back exhaust that adheres to these emission standards ensures that your upgrade will not lead to legal issues or failed inspections. Additionally, local noise regulations vary widely, so opting for a system with an appropriate sound level can prevent fines and complaints, maintaining a balance between performance and community standards.

Material and durability

Choosing the right material plays a significant role when selecting the best cat back exhaust for WRX models. Stainless steel and titanium are two popular options, each offering distinct benefits. Stainless steel is known for its excellent corrosion and rust resistance, making it ideal for various weather conditions and road salt exposure.

It tends to provide long-lasting durability without compromising performance. On the other hand, titanium stands out due to its lightweight nature and high strength, which can improve overall vehicle efficiency while still resisting rust effectively.

The build quality of the exhaust system is equally important, especially the precision of welds, as strong and smooth welds prevent leaks and enhance the system’s lifespan. Attention to craftsmanship ensures that the exhaust withstands thermal expansion and vibrations from daily driving or spirited sessions. When considering use cases, regular street driving often benefits from stainless steel’s robustness, while those seeking performance gains and weight reduction may lean toward titanium.

Choosing an exhaust with high-quality welds and corrosion-resistant materials will contribute to better sound, reliability, and longevity for any WRX owner.

Price and value

When selecting the best cat back exhaust for WRX vehicles, balancing cost with performance is a key factor to keep in mind. An effective exhaust system enhances engine output and sound without demanding excessive investment, making it critical to evaluate options that offer noticeable gains without overspending.

Over time, long-term value involves not only the initial expense but also maintenance requirements and durability. Choosing a system built from high-quality materials can reduce the need for frequent repairs and replacements, thereby lowering ongoing costs. Additionally, selecting a product with readily available replacement parts helps avoid extended downtime and frustrations, ensuring that any necessary upgrades or fixes can be handled smoothly.

This combination of balanced cost, sustained performance benefits, and accessible components makes for a smart purchase that complements the WRX’s capabilities and keeps it running efficiently for years to come.

Frquently Asked Questions

What Are The Top-Rated Cat Back Exhaust Systems For A Wrx?

Top-rated cat-back exhaust systems for a Subaru WRX include brands like Borla, Cobb Tuning, and Invidia. Borla exhausts are known for their high-quality stainless steel construction and aggressive sound, enhancing performance without drone. Cobb Tuning offers systems that balance sound and power gains, with a reputation for reliability and ease of installation. Invidia exhausts are widely praised for their deep, sporty tone and significant weight reduction compared to stock systems. These exhausts improve exhaust flow, resulting in better horsepower and torque, making them popular choices among WRX enthusiasts seeking both sound and performance upgrades.

How Difficult Is It To Install A Cat Back Exhaust On A Subaru Wrx?

Installing a cat-back exhaust on a Subaru WRX can be moderately challenging, especially for those without prior automotive experience. The process involves removing the factory exhaust components and securely fitting the new system, which may require specific tools like wrenches, jack stands, and penetrating oil for rusty bolts. It’s important to carefully follow the manufacturer’s instructions to ensure proper alignment and avoid leaks. However, for someone with basic mechanical skills and patience, it’s a manageable DIY project. If unsure, seeking help from a professional mechanic is recommended to ensure optimal performance and safety.

Which Cat Back Exhaust Offers The Best Sound Quality For A Wrx?

For a Subaru WRX, the Borla Cat-Back Exhaust is often praised for offering the best sound quality. It delivers a deep, aggressive tone without being overly loud or droning at highway speeds. The Borla system uses high-quality stainless steel and precision engineering to enhance both performance and sound. Another popular option is the Invidia N1 Cat-Back Exhaust, known for its balanced, sporty sound that complements the WRX’s turbocharged engine. It provides a noticeable growl on acceleration while maintaining smoothness during cruising, making it a favorite among WRX enthusiasts seeking a refined exhaust note.

Are There Any Cat Back Exhausts For Wrx That Provide A Good Balance Between Price And Performance?

Yes, there are several cat-back exhaust systems for the WRX that offer a great balance between price and performance. Brands like COBB Tuning, Invidia, and Borla are popular choices among enthusiasts for their quality construction, improved exhaust flow, and enhanced sound without breaking the bank. These systems are designed to boost horsepower and torque while maintaining a reasonable price point. Many cat-back exhausts for the WRX also provide easy bolt-on installation and compatibility with stock or lightly modified setups. This makes them an ideal upgrade for those looking to improve performance and sound without extensive modifications or excessive costs.

How Does A Cat Back Exhaust Improve The Performance Of A Subaru Wrx?

A cat back exhaust improves the performance of a Subaru WRX by enhancing the flow of exhaust gases from the engine. This reduces backpressure, allowing the engine to breathe more efficiently and produce increased horsepower and torque. The improved airflow also helps the turbocharger spool faster, resulting in better throttle response and acceleration. Additionally, a cat back exhaust often reduces the overall weight of the exhaust system, contributing to better handling and fuel efficiency. Along with performance gains, it also produces a more aggressive exhaust note, enhancing the driving experience.

Conclusion

Choosing the best cat back exhaust for WRX involves balancing performance gains, sound quality, and durability. This upgrade typically enhances horsepower and torque while providing a more aggressive exhaust note, appealing to those who want both style and function. However, some options may be louder than average or require professional installation, which could increase overall cost.

However, some options may be louder than average or require professional installation, which could increase overall cost. The ideal cat back exhaust suits drivers seeking improved engine efficiency and a sportier driving experience without compromising daily usability. By weighing the pros and cons and matching them to your personal preferences and budget, you can confidently select a system that enhances your WRX’s appeal.

Overall, the best cat back exhaust for WRX offers a worthwhile enhancement for those aiming to elevate their vehicle’s performance and sound.