Mishimoto 3in Downpipe to Stock Cat-Back Adapter - Subaru Turbo Models (inc. 2015-2021 WRX / STI / 2004-2013 Forester)
Mishimoto 3in Downpipe to Stock Cat-Back Adapter - Subaru Turbo Models (inc. 2015-2021 WRX / STI / 2004-2013 Forester)
Mishimoto
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PRODUCT DETAILS
RallySport Direct proudly carries a large line of Mishimoto performance cooling and go-fast components along with everything in between.
Including the Mishimoto Subaru 3-Inch Downpipe to Stock Exhaust Adapter. This is a great option for those of you with an aftermarket downpipe who want to retain the stock cat-back exhaust system. This adapter will allow for a great fitment with a leak-free seal and features excellent fabrication quality that can be installed using your basic garage tools.
DETAILS:
- Allows smooth exhaust-flow transition between the 3" downpipe and the stock-sized exhaust
- Eliminates infamous exhaust leaks caused by mating different exhaust flanges
- 304 Stainless steel adapter
- Installs in about 15 minutes on average
- Includes stainless steel hardware, and a 3" two-bolt flange gasket
WHY WE CARRY THIS
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
RallySport Direct proudly carries a large line of Mishimoto performance cooling and go-fast components along with everything in between.
Including the Mishimoto Subaru 3-Inch Downpipe to Stock Exhaust Adapter. This is a great option for those of you with an aftermarket downpipe who want to retain the stock cat-back exhaust system. This adapter will allow for a great fitment with a leak-free seal and features excellent fabrication quality that can be installed using your basic garage tools.
DETAILS:
- Allows smooth exhaust-flow transition between the 3" downpipe and the stock-sized exhaust
- Eliminates infamous exhaust leaks caused by mating different exhaust flanges
- 304 Stainless steel adapter
- Installs in about 15 minutes on average
- Includes stainless steel hardware, and a 3" two-bolt flange gasket
