plug and play . kit's been on my 04 Z33 for a few months without any issues or check engine lights . the adapter pates from Coz are top notch and the whole install was super easy . however on a completely stock engine you will probably not see any difference in power I would recommend this if your going to have plenty of supporting mods on your Z along with a good tune but if you have a faulty oem unit then get this kit .

Was going to order the NWP but I thought I’d give CZP 75mm throttle body a shot and let me tell you, This product works great! My butt dyno noticed a immediate difference.