If you’re searching for a cat back exhaust for Subaru WRX, you’re likely after improved performance, a more aggressive sound, and a custom look. The DNA Motoring CBE-WRX15-D stands out as the best overall choice, offering a balanced mix of durability and performance. For those on a budget, the PHILTOP System provides noticeable sound and power gains at a lower cost. Meanwhile, the AWE Tuning Track Edition appeals to enthusiasts seeking a premium, track-ready setup. The main challenge in this category is balancing sound, power, and price—more aggressive setups often mean increased drone or higher costs. Continue reading for a detailed breakdown of each option to find your perfect fit.
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Key Takeaways
- Top picks balance performance gains with sound quality and build durability.
- Higher-priced options tend to deliver better materials and a more refined sound profile.
- Budget-friendly systems can offer impressive improvements but may compromise on quality or noise levels.
- Materials like stainless steel and titanium significantly impact longevity and corrosion resistance.
- Installation ease varies, with some systems designed for straightforward bolt-on fitment, while others may require welding or professional setup.
| DNA Motoring CBE-WRX15-D Stainless Steel Cat Back Exhaust System for 2015-2017 Subaru WRX & STI Sedan |  | Best Overall for Performance and Durability | Compatibility: 2015-2017 Subaru WRX & STI Sedan | Material: T-304 Stainless Steel | Inlet Diameter: 2.5 inches | VIEW ON AMAZON | See Our Full Breakdown |
| PHILTOP Cat-Back Exhaust System for 2015-2017 Subaru WRX/WRX STI |  | Best Value with Easy Bolt-On Installation | Vehicle Fitment: 2015-2017 Subaru WRX/WRX STI | Material: T-304 stainless steel | Installation: Direct bolt-on | VIEW ON AMAZON | See Our Full Breakdown |
| Spec-D Tuning S/S Quad Burnt Tip Catback Exhaust System |  | Best for Older Models with Style Focus | Fitment: Subaru Impreza WRX/STI sedan 2008-2014 | Material: Stainless Steel | Tip Style: Quad Burnt Tip | VIEW ON AMAZON | See Our Full Breakdown |
| DNA MOTORING CBE-WRX02-BT Stainless Steel Cat Back Exhaust System for 2002-2007 Subaru Impreza WRX/WRX STI |  | Best for Classic Subaru Owners Seeking Deep Tone | Material: T-304 Stainless Steel | Fitment: 2002-2007 Subaru Impreza WRX/WRX STI | Muffler Diameter: 4 inches | VIEW ON AMAZON | See Our Full Breakdown |
| KAX Cat Back Exhaust System Compatible with 2015-2017 Subaru WRX/WRX STI |  | Best for Ease of Installation and Reliable Performance | Fitment: 2015-2017 Subaru WRX/WRX STI | Material: Stainless Steel | Weight: 25.1 pounds | VIEW ON AMAZON | See Our Full Breakdown |
| BORLA 140595 Cat-Back Performance Exhaust System for 2015-2021 Subaru Impreza WRX & WRX STI 2.0L/2.5L |  | Best Overall for Performance and Durability | Material: T-304 Stainless Steel | Installation: Bolt-on | Construction: All Welded | VIEW ON AMAZON | See Our Full Breakdown |
| Replacement Stainless Steel Exhaust Axle Back for 2015-2021 Subaru WRX STI |  | Best for Aesthetic Upgrade and Fitment Simplicity | Fitment: 2015-2021 Subaru WRX STI | Material: Stainless Steel | Tips: 4-inch Double Wall Quad Tips | VIEW ON AMAZON | See Our Full Breakdown |
| Replacement Exhaust System for 2015-2021 Subaru WRX STI, Stainless Steel Double Wall Quad Tips, 4 Inches |  | Best for Complete Exhaust Replacement and Seamless Fit | Fits: 2015-2021 Subaru WRX STI | Material: Stainless Steel | Tip Size: 4 Inches | VIEW ON AMAZON | See Our Full Breakdown |
| Spec-D Tuning 4-inch Stainless Steel Catback Exhaust Dual Tip System for Subaru Impreza WRX/STI (2008-2014) |  | Best for Budget-Conscious and Older Model Owners | Brand: SPEC-D TUNING | Material: Stainless Steel | Diameter: 4 inches | VIEW ON AMAZON | See Our Full Breakdown |
| REV9 CB-083 FlowMaxx Stainless Steel Cat-back Exhaust Quad-tip System for Subaru WRX (VB) 2022-2025 |  | Best for Modern, Performance-Driven WRX (2022-2025) | Compatibility: WRX (VB) 2022-2025 | Inlet/Outlet Diameter: 2.5 inches | Tip Size: 3.5 inches | VIEW ON AMAZON | See Our Full Breakdown |
| Invidia N1 Twin Outlet Single Layer Cat-Back Exhaust System with Titanium Tip for Subaru WRX STI 4-Door |  | Best Overall for Performance and Durability | Piping diameter: 76 millimeters | Tip size: 101 millimeters | Material: SUS304 stainless steel | VIEW ON AMAZON | See Our Full Breakdown |
| AWE Tuning Track Edition Cat-Back Exhaust for 2011-2018 Subaru WRX/STI Sedan |  | Best for Sporty Sound and Model-Specific Fit | Brand: AWE Tuning | Model Number: 3020-43066 | UPC: 689750117772 | VIEW ON AMAZON | See Our Full Breakdown |
| DNA MOTORING CBE-WRX02 Cat Back Exhaust System for 2002-2007 Subaru Impreza WRX/WRX STI |  | Best for Older Subaru Models and Increased Power | Compatibility: 2002-2007 Subaru Impreza WRX/WRX STI | Material: T-304 Stainless Steel | Construction: Mandrel-Bent, TIG Welded CNC Flanges | VIEW ON AMAZON | See Our Full Breakdown |
| cat back exhaust for subaru wrx | Material |
|---|---|
| DNA Motoring CBE-WRX15-D Stain | T-304 Stainless Steel |
| PHILTOP Cat-Back Exhaust Syste | T-304 stainless steel |
| Spec-D Tuning S/S Quad Burnt T | Stainless Steel |
| DNA MOTORING CBE-WRX02-BT Stai | T-304 Stainless Steel |
| KAX Cat Back Exhaust System Co | Stainless Steel |
| BORLA 140595 Cat-Back Performa | T-304 Stainless Steel |
| Replacement Stainless Steel Ex | Stainless Steel |
| Replacement Exhaust System for | Stainless Steel |
| Spec-D Tuning 4-inch Stainless | Stainless Steel |
| REV9 CB-083 FlowMaxx Stainless | Stainless Steel |
| Invidia N1 Twin Outlet Single | SUS304 stainless steel |
| AWE Tuning Track Edition Cat-B | — |
| DNA MOTORING CBE-WRX02 Cat Bac | T-304 Stainless Steel |
More Details on Our Top Picks
DNA Motoring CBE-WRX15-D Stainless Steel Cat Back Exhaust System for 2015-2017 Subaru WRX & STI Sedan
This system stands out for its high-quality T-304 stainless steel construction and mandrel bends, which significantly improve horsepower and torque compared to stock setups. Unlike the more affordable options like the KAX, it offers a more aggressive sound profile and better backpressure reduction, making it ideal for enthusiasts seeking a noticeable performance boost. However, the installation is more complex, requiring some technical skill, and the increased noise level might be too loud for daily street driving. Its compatibility is limited to specific Subaru models, so it’s less versatile for other vehicles.
Best for performance-focused owners who want a durable, high-performance system and are comfortable with installation challenges.
NotIdealFor casual users or those seeking a quiet exhaust experience, as this system can be quite loud and installation is involved.
- Improves horsepower and torque
- Made of durable high-quality stainless steel
- Enhances sound with an aggressive tone
- Reduces exhaust backpressure for better efficiency
- Installation may require technical skill
- May increase exhaust noise beyond stock levels
- Compatibility limited to specific Subaru models
Verdict: This pick suits drivers who prioritize performance and durability over ease of installation and quiet operation.
- Compatibility:2015-2017 Subaru WRX & STI Sedan
- Material:T-304 Stainless Steel
- Inlet Diameter:2.5 inches
- Main Piping Diameter:2.5 inches
- Muffler Tip Diameter:4 inches
- Removable Silencer:Yes
Our verdict“Best Overall for Performance and Durability — a strong pick in this lineup.”
PHILTOP Cat-Back Exhaust System for 2015-2017 Subaru WRX/WRX STI
Compared with the DNA Motoring system, the PHILTOP offers a straightforward bolt-on design that requires no modifications, making it appealing to DIY enthusiasts. It’s constructed from high-quality T-304 stainless steel, ensuring durability and corrosion resistance. While it enhances exhaust sound and performance, it can produce a significantly louder noise, which might be a drawback for daily drivers seeking a subtle upgrade. Its limited compatibility to specific Subaru models keeps it from being a universal solution, but the included gaskets and hardware simplify installation.
Best for owners who want a hassle-free upgrade with sound and performance improvements without extensive modifications.
NotIdealFor drivers who prefer a quieter exhaust or own non-compatible Subaru models, as it might be too loud or incompatible.
- Easy bolt-on installation with no modifications
- Made from durable, corrosion-resistant stainless steel
- Improves exhaust sound and performance
- Includes necessary gaskets and hardware
- May significantly increase exhaust noise
- Limited compatibility restricts versatility
Verdict: This system is best suited for owners seeking a reliable, easy-to-install upgrade that boosts sound and performance without complex modifications.
- Vehicle Fitment:2015-2017 Subaru WRX/WRX STI
- Material:T-304 stainless steel
- Installation:Direct bolt-on
- Includes:Gaskets and hardware
Our verdict“Best Value with Easy Bolt-On Installation — a strong pick in this lineup.”
Spec-D Tuning S/S Quad Burnt Tip Catback Exhaust System
This exhaust system caters to Subaru Impreza WRX/STI models from 2008 to 2014, emphasizing aesthetics with its distinctive quad burnt tips. While it’s easy to install with minimal modifications, it offers no detailed performance figures, making it less appealing for those seeking measurable gains. Compared to the newer DNA Motoring or PHILTOP options, it prioritizes visual impact over performance metrics. The stainless steel construction ensures durability, but the limited fitment scope and lack of performance data mean it’s better suited for owners who value appearance first.
Best for owners of older Subaru models who want a stylish exhaust upgrade without demanding high performance gains.
NotIdealFor owners of newer models or those seeking significant horsepower improvements, as this system is primarily aesthetic and fitment-specific.
- Compatible with 2008-2014 Subaru models
- Easy installation with minimal modifications
- Durable stainless steel construction
- Unique quad burnt tip design
- Limited to older Subaru models
- No detailed performance specifications provided
Verdict: This pick is ideal for owners prioritizing visual appeal on older Subaru WRX/STI models rather than performance metrics.
- Fitment:Subaru Impreza WRX/STI sedan 2008-2014
- Material:Stainless Steel
- Tip Style:Quad Burnt Tip
- Installation:Minimal modifications
Our verdict“Best for Older Models with Style Focus — a strong pick in this lineup.”
DNA MOTORING CBE-WRX02-BT Stainless Steel Cat Back Exhaust System for 2002-2007 Subaru Impreza WRX/WRX STI
This older model-specific system emphasizes a deep, aggressive exhaust tone, appealing to enthusiasts who prefer a more pronounced sound. While it increases horsepower and torque similar to the DNA Motoring CBE-WRX15-D, it is tailored for 2002-2007 Impreza models, making it less suitable for newer WRX/STI owners. Its durable T-304 stainless steel construction and CNC flange enhance longevity and resistance to corrosion. Compared to later models, it offers a similar performance boost but with a more classic design and slightly different piping dimensions, which may affect fitment in certain setups.
Best for owners of older Subaru Impreza WRX/STI models seeking a deep, aggressive exhaust note with reliable durability.
NotIdealFor owners of newer models or those seeking a quieter exhaust, as this system is louder and designed for specific vintage models.
- Deep, aggressive exhaust tone
- Made of durable stainless steel
- Increases horsepower and torque
- Resistant to corrosion with CNC flange
- Installation may require technical skills
- Limited to 2002-2007 Subaru models
Verdict: This system suits classic Subaru owners wanting a deep sound and reliable performance in older models.
- Material:T-304 Stainless Steel
- Fitment:2002-2007 Subaru Impreza WRX/WRX STI
- Muffler Diameter:4 inches
- Inlet Diameter:2.25 inches
- Main Piping Diameter:2.25 inches
Our verdict“Best for Classic Subaru Owners Seeking Deep Tone — a strong pick in this lineup.”
KAX Cat Back Exhaust System Compatible with 2015-2017 Subaru WRX/WRX STI
Compared to the PHILTOP and DNA Motoring options, the KAX system offers a straightforward installation process with no cutting or drilling, making it highly appealing for owners who want a quick upgrade. Its stainless steel build ensures good durability and corrosion resistance, and it provides performance improvements while managing noise levels effectively. However, its specific fitment limits versatility, and some owners may find that it doesn’t deliver as aggressive a sound as higher-end systems. Its compact dimensions and lighter weight make it suitable for those prioritizing ease of installation without sacrificing too much performance.
Best for owners who want an easy, no-fuss upgrade that still offers performance gains and durability.
NotIdealFor owners of non-compatible models or those seeking a highly aggressive or loud exhaust note, as this system is more subdued in sound and fitment-specific.
- Durable stainless steel construction
- Easy installation without cutting or drilling
- Reduces noise and improves flow
- High-quality craftsmanship
- Limited fitment scope
- May not produce as aggressive a sound as premium options
Verdict: This system is perfect for owners seeking a simple, reliable upgrade with minimal fuss and solid performance improvements.
- Fitment:2015-2017 Subaru WRX/WRX STI
- Material:Stainless Steel
- Weight:25.1 pounds
- Dimensions:45.67 x 9.06 x 17.32 inches
- Manufacturer Part Number:4791ESK062SUS
Our verdict“Best for Ease of Installation and Reliable Performance — a strong pick in this lineup.”
BORLA 140595 Cat-Back Performance Exhaust System for 2015-2021 Subaru Impreza WRX & WRX STI 2.0L/2.5L
This BORLA system stands out for its combination of high-quality T-304 stainless steel construction and a bold, aggressive exhaust note, making it ideal for enthusiasts seeking maximum performance. Compared with the REV9 FlowMaxx, BORLA offers a more refined yet powerful sound, though it’s heavier at 48 lbs, which might concern those with lighter vehicle setups. Its bolt-on design simplifies installation, but the weight could be a drawback for some DIYers. The system’s durability and flow efficiency make it a top choice for daily drivers and track day aficionados alike.
Pros:- Enhanced exhaust sound with a powerful, aggressive tone
- Built from durable T-304 stainless steel for longevity
- Easy bolt-on installation with all welded construction
Cons:- Heavy weight at 48 lbs may be cumbersome for some installations
- Potentially loud for drivers seeking a quieter ride
Best for: Performance-focused drivers who want a durable, high-flow exhaust for both street and track use
Not ideal for: Casual owners preferring a quieter, less conspicuous exhaust system or those concerned about weight
- Material:T-304 Stainless Steel
- Installation:Bolt-on
- Construction:All Welded
- Dimensions:45 x 31 x 11 inches
- Weight:48 lbs
- Warranty:Manufacturer’s Warranty
Our verdict“This system delivers maximum performance and durability for enthusiasts who prioritize sound and flow over weight and noise levels.”
Replacement Stainless Steel Exhaust Axle Back for 2015-2021 Subaru WRX STI
This axle back exhaust offers a polished stainless steel finish with quad tips, making it a stylish upgrade from stock, especially compared with the more performance-oriented BORLA system. It’s designed for a straightforward fitment on 2015-2021 WRX STI models, including all hardware, but doesn’t support aftermarket mid-pipes like SPT, limiting versatility. Its complete hardware package ensures a clean install, though professional installation might be needed for perfect fitment. This pick is ideal for drivers who want a noticeable aesthetic change with a reliable fitment.
Pros:- Durable polished stainless steel finish
- Complete hardware kit included for easy installation
- Guaranteed fitment for specified models
Cons:- Does not fit with aftermarket exhaust systems or SPT mid-pipe
- May require professional help for optimal fit
Best for: Owners seeking a visual upgrade with a clean, polished look and straightforward installation
Not ideal for: Performance enthusiasts looking for maximum flow or sound customization, or those with aftermarket mid-pipes
- Fitment:2015-2021 Subaru WRX STI
- Material:Stainless Steel
- Tips:4-inch Double Wall Quad Tips
- Package Includes:Exhaust Tips, Hangers, Gaskets, Nuts & Bolts
Our verdict“This axle back provides a sleek, polished upgrade perfect for owners wanting a stylish, straightforward enhancement without complex modifications.”
Replacement Exhaust System for 2015-2021 Subaru WRX STI, Stainless Steel Double Wall Quad Tips, 4 Inches
Compared to the axle back option, this full replacement exhaust system offers a comprehensive upgrade with a 3-inch mid-pipe and durable stainless steel construction, ensuring maximum performance and a unified look. Its specific design for 2015-2021 WRX STI models guarantees a precise fit, but it’s heavier at 45 pounds, similar to the BORLA system. Installation is straightforward with included hardware, yet the weight and limited warranty period of one year might deter those seeking ultra-lightweight or longer-term options. It’s ideal for owners wanting a full-system upgrade that improves both sound and performance.
Pros:- Durable stainless steel construction
- Complete system with mid-pipe and quad tips
- Designed specifically for WRX STI models
Cons:- Heavy at 45 pounds, may require sturdy mounting
- Limited to a one-year warranty
Best for: Owners replacing the entire exhaust for performance gains and a cohesive look
Not ideal for: Casual drivers or those with aftermarket mid-pipes incompatible with this system
- Fits:2015-2021 Subaru WRX STI
- Material:Stainless Steel
- Tip Size:4 Inches
- Package Includes:Quad Tips, Mid-Pipe Kit, Hardware
- Weight:45 pounds
- Warranty:Limited One Year
Our verdict“This full exhaust replacement is best suited for owners seeking a comprehensive upgrade in sound, performance, and fitment for their WRX STI.”
Spec-D Tuning 4-inch Stainless Steel Catback Exhaust Dual Tip System for Subaru Impreza WRX/STI (2008-2014)
Compared with newer systems like REV9 FlowMaxx or BORLA, this Spec-D Tuning offers a cost-effective upgrade for 2008-2014 Subaru Impreza WRX/STI sedans, emphasizing ease of installation and improved sound. Its stainless steel build and dual tips give a sporty look, though it’s limited to older models and sedans, which might not suit newer hatchback owners or those seeking cutting-edge performance. The shorter warranty period of 30 days refund and 90 days replacement reflects its affordability, but reliability may be less consistent than premium options. This is a good choice for budget-minded owners of older models who want a simple upgrade.
Pros:- Affordable stainless steel construction
- Easy to install with minimal modifications
- Enhances sound and performance for older models
Cons:- Limited to specific model years and sedan body styles
- Shorter warranty period reduces confidence in long-term durability
Best for: Owners of 2008-2014 Subaru WRX/STI sedans on a budget looking for an aesthetic and performance boost
Not ideal for: Owners of newer models or those seeking a long-term, high-performance exhaust system
- Brand:SPEC-D TUNING
- Material:Stainless Steel
- Diameter:4 inches
- Compatibility:2008-2014 Subaru Impreza WRX/STI Sedan
- Included Components:Catback Exhaust
- Warranty:30 days refund, 90 days defective replacement
Our verdict“This system offers a budget-friendly upgrade for older Subaru WRX/STI sedans, suitable for owners prioritizing affordability over long-term durability.”
REV9 CB-083 FlowMaxx Stainless Steel Cat-back Exhaust Quad-tip System for Subaru WRX (VB) 2022-2025
This REV9 system makes a strong case for owners of the latest WRX models, with mandrel-bent piping and a deep, aggressive sound that rivals the BORLA’s performance but with a more modern design. Its 3.5-inch double-walled tip adds a sporty aesthetic, and the CARB legal status ensures compliance for street use. While it’s easier to install than some full systems, the louder exhaust volume might be overwhelming for those seeking a quieter ride. Its durable stainless steel construction promises long-term reliability, making it ideal for owners wanting both style and performance in their new WRX.
Pros:- Deep, aggressive exhaust note enhances sporty character
- High-quality stainless steel with mandrel bends
- CARB legal, suitable for street use
Cons:- Louder sound may not suit all owners
- Installation might require some mechanical skill
Best for: Owners of 2022-2025 Subaru WRX (VB) seeking a performance upgrade with a sporty look and sound
Not ideal for: Drivers who prefer a quieter, more subdued exhaust tone or who want a system compatible with older models
- Compatibility:WRX (VB) 2022-2025
- Inlet/Outlet Diameter:2.5 inches
- Tip Size:3.5 inches
- Material:Stainless Steel
- Warranty:1 year manufacturer-limited
- Includes:Piping, Muffler, Clamp, Gasket
Our verdict“This system provides a performance-oriented upgrade for newer WRX models, balancing aggressive sound and modern styling with street legality.”
Invidia N1 Twin Outlet Single Layer Cat-Back Exhaust System with Titanium Tip for Subaru WRX STI 4-Door
The Invidia N1 stands out as the most well-rounded choice for Subaru WRX STI owners seeking a combination of performance and longevity. Its SUS304 stainless steel construction guarantees resistance against corrosion, while mandrel-bent piping ensures improved exhaust flow, translating into noticeable gains in mid to top-end power. Compared with the AWE Tuning Track Edition, which emphasizes sporty sound and aesthetics, the N1 offers a more durable build suited for daily driving and motorsport use. However, its installation can be complex, requiring some mechanical skill, and it tends to produce louder noise levels, which may not suit all drivers. If durability and a sporty look are priorities, this system makes a compelling case.
Pros:- High-quality SUS304 stainless steel resists corrosion and wear
- Mandrel-bent piping optimizes exhaust flow for better power
- Polished titanium tip adds sporty visual appeal
- Enhanced mid to top-end power and torque
Cons:- Installation may require technical mechanical skills
- Designed specifically for Subaru WRX STI, limiting compatibility
- Increased noise levels could be disruptive for some drivers
Best for: Performance enthusiasts who want a durable, high-flow exhaust with a sporty appearance
Not ideal for: Casual drivers seeking a quiet, easy-install upgrade without added noise or complexity
- Piping diameter:76 millimeters
- Tip size:101 millimeters
- Material:SUS304 stainless steel
- Application:Subaru WRX STI 2008-Up
Our verdict“This exhaust suits drivers who prioritize performance, durability, and sporty aesthetics but are comfortable with some installation effort and noise.”
AWE Tuning Track Edition Cat-Back Exhaust for 2011-2018 Subaru WRX/STI Sedan
The AWE Tuning Track Edition is tailored for 2011-2018 Subaru WRX and STI sedans, excelling in delivering a sporty exhaust note that enhances driving enjoyment. Compared to the Invidia N1, which emphasizes durability and high flow, the AWE system focuses on a resonant sound and clean look, making it ideal for drivers wanting a more aggressive auditory presence. Its direct replacement design simplifies installation, but it only includes the main component, requiring additional parts or customizations, which can complicate setup. Limited to certain models and years, it’s less versatile but offers a refined, sporty experience for the right Subaru owner.
Pros:- Improves exhaust flow and overall performance
- Sporty, aggressive exhaust tone enhances driving experience
- Designed as a direct replacement for stock exhaust
Cons:- Limited compatibility to specific Subaru models and years
- Includes only the main component, requiring extra parts for complete installation
- No detailed installation instructions provided
Best for: Sedan owners seeking a bold exhaust sound and a direct-fit replacement for their stock system
Not ideal for: Owners of earlier or wagon models, or those seeking a quieter or more versatile upgrade
- Brand:AWE Tuning
- Model Number:3020-43066
- UPC:689750117772
- Included Components:Main component only
- Warranty:30 days
Our verdict“This system is perfect for sedan drivers craving a sporty sound and straightforward installation, provided they’re prepared for additional parts and model restrictions.”
DNA MOTORING CBE-WRX02 Cat Back Exhaust System for 2002-2007 Subaru Impreza WRX/WRX STI
The DNA MOTORING CBE-WRX02 offers a compelling upgrade for older Subaru Impreza WRX and STI models from 2002 to 2007. Its T-304 stainless steel construction ensures long-term durability, and mandrel bends promote smooth exhaust flow, contributing to a horsepower increase of 15-25 HP. Compared to the Invidia N1, which is more performance-oriented, this system balances power gains with a more aggressive, yet refined sound. The main tradeoff is the potential for higher noise levels that might be disruptive, and installation can be technically challenging. It’s an excellent choice for owners of older models seeking a noticeable power boost and a robust, aggressive tone.
Pros:- High-quality T-304 stainless steel resists corrosion
- Mandrel-bent tubing promotes smooth exhaust flow
- Increases horsepower and torque substantially
- Provides an aggressive, smooth exhaust tone
Cons:- Installation may require technical skills
- Significant exhaust noise could be loud for daily driving
- May not fit newer models without modifications
Best for: Owners of 2002-2007 Subaru Impreza WRX/STI looking for significant horsepower gains and a durable system
Not ideal for: Newer Subaru owners or those prioritizing quiet, easy-to-install upgrades
- Compatibility:2002-2007 Subaru Impreza WRX/WRX STI
- Material:T-304 Stainless Steel
- Construction:Mandrel-Bent, TIG Welded CNC Flanges
- Performance Increase:15-25 horsepower
Our verdict“Ideal for enthusiasts with older Subaru Impreza WRX/STI models seeking power and durability, aware of potential noise increase and installation complexity.”
How We Picked
I evaluated these cat back exhaust systems based on several key factors that matter to Subaru WRX owners. Performance improvements, including horsepower and torque gains, were a primary consideration, as well as sound characteristics—whether deep, aggressive, or refined. Durability and material quality, especially stainless steel and titanium, played a crucial role in selection, ensuring the systems withstand the elements. Ease of installation was also assessed, favoring bolt-on designs that don’t require welding. Lastly, I considered overall value, balancing cost against features and build quality. These criteria helped rank the options from versatile daily drivers to high-performance setups suitable for track use.| cat back exhaust for subaru wrx | Material |
|---|---|
| DNA Motoring CBE-WRX15-D Stain | T-304 Stainless Steel |
| PHILTOP Cat-Back Exhaust Syste | T-304 stainless steel |
| Spec-D Tuning S/S Quad Burnt T | Stainless Steel |
| DNA MOTORING CBE-WRX02-BT Stai | T-304 Stainless Steel |
| KAX Cat Back Exhaust System Co | Stainless Steel |
| BORLA 140595 Cat-Back Performa | T-304 Stainless Steel |
| Replacement Stainless Steel Ex | Stainless Steel |
| Replacement Exhaust System for | Stainless Steel |
| Spec-D Tuning 4-inch Stainless | Stainless Steel |
| REV9 CB-083 FlowMaxx Stainless | Stainless Steel |
| Invidia N1 Twin Outlet Single | SUS304 stainless steel |
| AWE Tuning Track Edition Cat-B | — |
| DNA MOTORING CBE-WRX02 Cat Bac | T-304 Stainless Steel |
Factors to Consider When Choosing Cat Back Exhaust For Subaru Wrx
Choosing the right cat back exhaust for your Subaru WRX involves understanding several core factors that influence performance, sound, and longevity. Beyond just style and price, it’s important to consider how the system will fit your driving style and maintenance expectations. This guide highlights key considerations to help you make a confident decision, avoiding common pitfalls like choosing overly loud systems or sacrificing durability for looks.Performance Gains and Sound
Performance improvements depend on the design and materials used. Look for systems that specify horsepower or torque increases, especially if you’ve upgraded the engine or intake. The sound profile is equally important—some owners prefer a deep, rumbling tone, while others want a louder, more aggressive roar. Remember, more aggressive sounds can lead to increased drone or noise restrictions in some areas. Balancing these aspects based on your preference is key to satisfaction.
Material and Build Quality
High-quality materials like stainless steel and titanium resist corrosion and withstand high temperatures better than aluminized steel or lower-grade options. Titanium, while more expensive, offers weight savings and durability, making it ideal for enthusiasts. Cheaper materials may rust or degrade faster, leading to costly replacements down the line. When selecting a system, consider how long you want it to last and whether the investment aligns with your usage.
Ease of Installation
Some cat back exhaust systems are designed for straightforward bolt-on installation, suitable for DIY enthusiasts. Others may require cutting, welding, or professional installation, which adds to the total cost and complexity. Be sure to check if the system comes with detailed instructions or if you’ll need additional adapters. An easier installation can save time and money, especially if you plan to swap systems frequently.
Legal and Sound Regulations
Before purchasing, verify local noise and emission laws. Some exhausts with aggressive sound profiles might not be street-legal in certain areas, potentially leading to fines or failed inspections. Systems labeled as ‘performance’ or ‘racing’ often exceed legal noise limits, so consider quieter options if you live in strict jurisdictions. That way, you avoid surprises and ensure your setup remains compliant.
Cost and Value
While premium systems tend to offer better materials and sound, they also come at a higher price. Conversely, budget options can provide noticeable gains but might lack longevity or sound quality. Consider how much you’re willing to invest based on your goals—whether for daily driving, spirited weekend runs, or track use. Sometimes, spending more upfront results in lower maintenance costs and better performance over time.
Frequently Asked Questions
Will a cat back exhaust significantly increase my Subaru WRX’s horsepower?
Yes, a properly designed cat back exhaust can improve horsepower and torque by reducing backpressure and improving exhaust flow. The actual gains depend on the system’s design and your vehicle’s modifications; for example, pairing it with a performance air intake or tune can maximize results. While the gains may not be dramatic on stock engines, they still contribute to a more responsive and aggressive driving experience.
How loud is a typical cat back exhaust on a Subaru WRX?
The noise level varies widely depending on the system’s design and muffler type. Many systems are designed to produce a deep, sporty tone without excessive drone, but some high-performance setups can be quite loud, especially at wide-open throttle. If you prefer a moderate sound that enhances performance without disturbing neighbors or violating noise laws, look for systems with sound-dampening features or quieter muffler options.
Do I need to tune my ECU after installing a new exhaust?
While many systems are bolt-on and don’t require tuning, some high-performance exhausts can benefit from an ECU tune to optimize airflow and fuel mapping. Tuning can unlock additional power and improve throttle response, especially if combined with other modifications. However, not all systems demand it; check the manufacturer’s recommendations and consider your specific goals before deciding whether to tune.
Are stainless steel exhaust systems worth the extra cost?
Stainless steel systems generally cost more upfront but offer superior corrosion resistance, durability, and a longer lifespan. They also tend to retain their appearance over time, resisting rust and discoloration. For owners who plan to keep their vehicle long-term or live in regions with harsh weather, investing in stainless steel can be a smart choice that pays off through reduced maintenance and replacement costs.
Can I install a cat back exhaust myself, or should I hire a professional?
Many bolt-on systems are designed for DIY installation with basic tools, making it feasible for experienced enthusiasts. However, some setups may require cutting, welding, or more advanced skills, in which case professional installation is advisable. If you lack mechanical experience or tools, hiring a professional ensures proper fitment, safety, and optimal performance, saving you time and potential headaches.
Conclusion
For general daily driving and those new to modifying their Subaru WRX, a system like the PHILTOP Cat-Back Exhaust offers a good balance of sound, performance, and affordability. Enthusiasts seeking the best overall, combining durability and a refined sound, should consider the DNA Motoring CBE-WRX15-D. For those willing to invest in a premium, track-ready setup, the AWE Tuning Track Edition provides exceptional build quality and performance. Budget-conscious buyers can find impressive gains with entry-level options, but should be mindful of potential compromises in durability or noise. Ultimately, your choice depends on your goals, budget, and how much you value sound versus longevity and performance.
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