GReddy Supreme SP Cat Back Exhaust - Subaru STi Sedan 2011-2014 Subaru-Legacy-GT-1999 The GSC Power-Division Single Cylindrical

The GSC Power-Division Single Cylindrical Valve Spring with Ti Retainer for the Subaru Turbo EJ platforms includes 16 titanium retainers and 16 cylindrical valve springs

(Flared end guarantees smooth exhaust flow)

In addition to the sheer size

Complete flow curves from 35 to 120 PSI and current draw vs

pressure drop is reduced

GReddy Supreme SP Cat Back Exhaust - Subaru STi Sedan 2011-2014 Subaru-Legacy-GT-1999 The GSC Power-Division Single CylindricalThis Greddy Supreme SP Cat Back Exhaust System is a performance oriented exhaust system designed to free the restriction from the OEM cat back exhaust to improve the performance and the sound. Features: 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" tips Fully hand welded 304 stainless steel materials Resonators installed in the