XForce 7-Series Twin 3in Cat-Back Exhaust (HSV Clubsport/GTS/Senator 09-17)DESCRIPTION XFORCE offers a range of uniquely engineered and designed stainless steel and mild steel bolt on exhaust systems. These exhaust systems bolt directly to existing mounting points making installation easy. They are built to perform well with materials designed for longevity and like all XFORCE exhaust systems they look and sound great! SPECIFICATIONS Twin 3" cat back system Twin hot dog style center resonators Raw 409 stainless steel Slip