Borla XR-1 Single-Tip Cat Back Exhaust Subaru WRX / STI 2002-2007 vendor_Prosport making the car more responsive

making the car more responsive while delivering more grip

BC 4340 steel Econo or Pro Series billet rods w/ARP 220

good heat tolerance

Hose Material Silicone

Borla XR-1 Single-Tip Cat Back Exhaust Subaru WRX / STI 2002-2007 vendor_Prosport making the car more responsivePart #: 140075 The Borla XR 1 Single Tip Catback Exhaust for the WRX and STI features 3in 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 3in adapter for future upgradability. The downpipe section Borla includes will bolt perfectly to your stock