GReddy Supreme SP Cat-Back Exhaust System - 2015-2021 Subaru WRX/STI

Spectral Performance 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