350z Z33 HR 370z Z34 VHR ISR Performance Stainless Steel Resonated Testpipe

These test pipes will eliminate your catalytic converter, and are designed for off-road use only. Utilizing a small resonator, the ISR Performance resonated test pipes will help cut some of the rasp of the exhaust note of your modified VQ while still providing much better exhaust gas flow than the OEM catalytic converter. These will help add the maximum amount of horsepower and torque to your VQ, especially when paired with the ISR Y-pipe and exhaust!