GReddy Supreme SP Cat-Back Exhaust System - 2015-2021 Subaru WRX/STI
GReddy Supreme SP Cat-Back Exhaust System - 2015-2021 Subaru WRX/STI
Greddy
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Every product is sourced from authorized manufacturers or distributors. If something isn’t right with fitment or condition, we’ll work with you to resolve it fairly.
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PRODUCT DETAILS
RallySport Direct carries a great selection of quality performance upgrades by the grandfathers of the sport compact industry, Greddy.
On this page, you are looking at the Greddy Supreme SP Cat-Back Exhaust System. This is a performance-oriented exhaust system designed to free the restriction from the OEM cat-back exhaust to improve the performance and the sound.
Here are the details:
- Combines larger piping diameter and smooth bends to limit turbulence under acceleration
- 3" piping diameter that routes to a 'Y' section for improved exhaust flow
- 3.5" oval tips
- Fully hand-welded 304 stainless steel materials
- Resonators installed in the center pipe and rear side pipes
- New gaskets included
- Reduces turbo lag
- Improves throttle response
- Improves horsepower
- Improves torque
- Aggressive sound
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 carries a great selection of quality performance upgrades by the grandfathers of the sport compact industry, Greddy.
On this page, you are looking at the Greddy Supreme SP Cat-Back Exhaust System. This is a performance-oriented exhaust system designed to free the restriction from the OEM cat-back exhaust to improve the performance and the sound.
Here are the details:
- Combines larger piping diameter and smooth bends to limit turbulence under acceleration
- 3" piping diameter that routes to a 'Y' section for improved exhaust flow
- 3.5" oval tips
- Fully hand-welded 304 stainless steel materials
- Resonators installed in the center pipe and rear side pipes
- New gaskets included
- Reduces turbo lag
- Improves throttle response
- Improves horsepower
- Improves torque
- Aggressive sound
