ISR Performance Exhaust Y-Pipe for 350z / G35 0 21 Mar 2016 16:47 Enjuku Racing ISR Performance Exhaust Y-Pipe for 350z / G35 The ISR Performance 350z / G35 Y-pipe utilizes 2.5" stainless steel piping along with bellowed flex sections running from the 2 bolt catalytic converter ..Price: $189.95