Flashark 2008-2021 Subaru WRX Sedan Cat-Back Exhaust System
Ready to Unleash the Boxer Roar? Give your WRX the aggressive sound it deserves with our Cat-Back Exhaust System, designed specifically for 2008–2021 WRX sedanss. This system brings out the iconic rumble of the Subaru Boxer engine with a deep, free-flowing exhaust note that intensifies as you climb through the revs. At wide-open throttle, it delivers a raw, rally-inspired tone while maintaining a refined growl during normal driving with zero drone. Whether you're carving mountain roads or heading to work, this system transforms your daily drive into a performance experience.
Unleash the Signature Subaru Boxer Rumble with Performance and Style
✔ Dyno-Proven Gains: Instantly increase horsepower by 18HP and boost low-end torque for quicker acceleration and throttle response
✔ High-Flow Design: 3-inch mandrel-bent piping ensures smooth, unrestricted exhaust flow to maximize engine efficiency
✔ Deep, Aggressive Sound: Delivers a true rally-inspired tone under throttle, with a clean, low growl during daily cruising
✔ Durable TIG-Welded Construction: CNC-machined flanges and precision welds provide strength, pressure resistance, and long-lasting durability
✔ Direct Bolt-On Fitment: No modifications required—designed for a perfect fit on all 2008–2021 WRX sedan
✔ Available in Two Material Options: Choose between T-304 stainless steel for superior corrosion resistance, or 201 stainless steel for a more budget-friendly option without sacrificing performance
Please Note: When cleaning exhaust tips, especially the blue tip variants, which are made using a heat treatment process that can be removed with aggressive cleaning agents, make sure to use water and, only if necessary, a very gentle soap. Never scrub or use any rubbing or cleaning compound on these tips as the color will be damaged and will not be warranted.
Specifications:
| Component | Material | Thickness (mm) | Notes |
|---|---|---|---|
| Bend Pipes | 304 / 201 Stainless Steel | 1.23 – 1.25 | Two material options available |
| Inner Perforated Tube (Muffler) | 409 Stainless Steel | 0.95 – 0.97 | Located inside the muffler body |
| Perforated Tube End Cap | 304 Stainless Steel | 0.87 | Cap the inner mesh tube |
| Flanges | 304 / 210 Stainless Steel | 10 | Laser-cut for precise fit |
What's In The Box?
- 1*Silencer Tail Pipe
- 2* Main Pipe A
- 1*Gaskets, Clamps, and Hardware Kit
Exhaust System vs. Cat-Back Exhaust
The Exhaust System refers to the entire assembly that routes exhaust gases from the engine to the tailpipe. It includes components such as exhaust manifolds, catalytic converters, resonators, mufflers, and exhaust tips—playing a vital role in emissions control, noise reduction, and gas expulsion.
In contrast, a Cat-Back Exhaust system only covers the section from the back of the catalytic converter to the exhaust tip—excluding the catalytic converter itself. Upgrading to a Cat-Back system is a popular modification for those seeking improved exhaust flow, a deeper and more aggressive sound, and enhanced throttle response—all without altering the emissions-critical components near the engine. It’s a straightforward, emissions-compliant upgrade with noticeable gains and simple bolt-on installation.
Fitment & Compatibility
| Brand | Model | Year Range | Full Compatible Specs |
|---|---|---|---|
| Subaru | WRX Sedan | 2008-2021 | 4-Door Sedan Body Style; 2008-2014 GE Chassis / 2015-2021 VA Chassis; Factory-Equipped 2.5L EJ255 / 2.0L FA20F Turbocharged Boxer Flat-4 (H4) Engines |
Frequently Asked Questions: 2008-2021 Subaru WRX Sedan Catback Exhaust
Q1: Will this subaru wrx exhaust system fit my 2017 wrx exhaust or 2020 wrx exhaust setup?
A1: Yes, absolutely! This Flashark subaru wrx sedan cat-back exhaust system is perfectly designed to be a direct bolt-on fit for all 2008-2021 WRX Sedan models. Whether you have an older G3 chassis or are looking for a VA subaru wrx catback exhaust (2015-2021), this system will fit your sedan flawlessly.
Q2: Will this fit my WRX Hatchback, or only the Sedan?
A2: This specific 2008–2021 subaru wrx/sti sedan catback exhaust system stainless steel is designed exclusively for 4-door Sedan models. Due to different piping lengths and bumper layouts, it will NOT fit the 5-door hatchback WRX models from 2008-2014.
Q3: I have a 2022+ WRX. Will this 2021 wrx exhaust system fit my car?
A3: No. This system is strictly for 2008-2021 models. It is not compatible with the 2022, 2023, or 2024 subaru wrx cat back exhaust (VB chassis) setups due to major platform changes by Subaru. Please ensure your vehicle is between 2008 and 2021 before ordering.
Q4: Does this fit the WRX STI as well? I am looking for a 2016 sti exhaust.
A4: Yes! This cat back exhaust subaru wrx system also fits 2011-2021 Subaru WRX STI Sedans. (Note: The 2008-2010 STI was only available as a hatchback, so this sedan exhaust will not fit those specific early STI years, but fits perfectly for 2011+ STI sedans).
Q5: I want a loud exhaust for subaru wrx to hear the Boxer rumble. Is this it?
A5: Definitely. By replacing the restrictive factory wrx mufflers with our 3-inch mandrel-bent piping and straight-through design, you unlock that signature, deep, aggressive Subaru Boxer rumble. It provides a raw, rally-inspired tone under wide-open throttle while maintaining a clean growl with zero drone during daily highway cruising.
Q6: Do I need a wrx exhaust diagram or a mechanic to install this subaru wrx aftermarket exhaust?
A6: No complex wrx exhaust system diagram is required! This is a direct bolt-on subaru wrx performance exhaust. The kit includes all necessary gaskets, clamps, and hardware. It mounts directly to your OEM downpipe flanges, making it a straightforward install for any DIY enthusiast, though professional installation is always welcomed.
Q7: What is the difference between the 304 and 201 stainless steel subaru exhaust pipes options?
A7: We offer two variations in our subaru exhaust kits store to fit different budgets. The T-304 stainless steel offers the highest level of corrosion resistance and longevity (perfect for areas with road salt). The 201 stainless steel is a more budget-friendly option that still provides the exact same 18HP performance gains, great sound, and structural durability.
Q8: Is this just a 2021 wrx axle back exhaust or a full cat-back?
A8: This is a full cat-back exhaust wrx system. Unlike an axle-back that only replaces the rear mufflers, our kit replaces everything from the back of your catalytic converter to the exhaust tips (including the mid-pipe). This allows for maximum exhaust flow and significantly more horsepower than an axle-back.
Q9: Will upgrading to this 2019 wrx cat back exhaust cause a Check Engine Light (CEL)?
A9: No. Because this subaru wrx cat-back exhaust system installs completely after the catalytic converter, it does not alter or interfere with your emissions sensors. You get the sound and power without the headache of warning lights.
Q10: How should I clean the burnt blue tips on this subaru wrx exhaust upgrade?
A10: To preserve the beautiful heat-treated blue finish on your exhaust tips, use only water and a very gentle soap if absolutely necessary. Never use aggressive cleaning agents, rubbing compounds, or scrubbers, as this will permanently damage the color and void the finish warranty.
Q11: Will this fix the restrictive feel of my stock 2018 subaru wrx exhaust?
A11: Yes! The factory exhaust system is heavily baffled for noise reduction, which restricts exhaust gas velocity. Our 3-inch high-flow subaru exhaust system reduces backpressure, giving you instant throttle response, quicker turbo spool, and dyno-proven gains of up to 18HP.
Q12: If I want to see how this looks on the car, do you have a photo of this?
A12: Absolutely! If you are searching the web and asking "do you have a photo of this," simply scroll up to our product image gallery. We have detailed pictures showing the fitment, the beautiful TIG welds, and how perfectly the tailpipes align with the factory WRX/STI rear bumper cutouts.