ISR Performance S-Chassis LS Swap Y-PipeIS 240LS Y The all new ISR Performance S Chassis LS Swap Y Pipe is designed to provide a fabrication free exhaust solution for users swapping LSx motors into their S13 or S14! The new Y pipe will require users to utilize ISR Performance LS swap kit, and the all new HGC LS S Chassis Swap Headers. Once the users install those components they will be able to bolt this Y pipe to the 2 bolt flanges at the rear of their HGC headers and then bolt the rear of