This quality Pacemaker performance big bore exhaust system will not only increase the power output of your engine, but will also sound good too! This system is designed specifically for the VF Commodore Clubsport with either the 6L gen4 or 6.2L LS3 motor. The stainless piping in this system measures 63mm in diameter. Part number BB9559 for the complete kit. Stainless tips sold separately. OE Cats need welding in. Separate components are also available separately if required.