Often times when a test pipe is utilized, a Check Engine Light will come on with an O2 sensor code. This is due to the increased exhaust temp caused by the lack of a catalytic...
370z Nissan OEM Head to Header Exhaust Manifold Stud. Product # 14064-31U0CReplaces # 14064-31U02
These gaskets go between the cats and headers of the 370Z.