Borla XR-1 Single Tip Catback Exhaust WRX / STI (2002-2007) Wheels These shift knobs work with

These shift knobs work with both the stock lever and Kartboy shift lever

Mazdaspeed 3 2007-2009

AEM's V2 Cold Air Intake system for the 94-01 Acura Integra features a dual chamber design which is basically two different piping sizes in the intake

This diffuser is compatible ONLY with the Borla catback

All Centric Parts premium brake rotors for the BRZ/FR-S are engineered and manufactured using stringent

Borla XR-1 Single Tip Catback Exhaust WRX / STI (2002-2007) Wheels These shift knobs work withBorla's XR 1 catback exhaust for the Subaru WRX STI features 3" piping with Borla's patented XR 1 multi core muffer for optimal flow. This system does not use a resonator like the Hush, so it has a deep, powerful tone. The section of the catback that bolts to the downpipe is slip fit, and can be replaced with the 3" adapter for future upgradability. For the WRX STI, the downpipe section Borla includes will bolt perfectly to your stock downpipe, but