Plenum Block Off Plates
This kit contains everything you need to block off all the intake plenum accessories on your Z31. You can block off the idle air control valve (IAC), cold start idle up valve, and the exhaust gas recirculation (EGR) valve as well as the EGR port in the exhaust manifold. All the bolts needed are included as well to make it a quick, easy install.
We recommend using a thin layer of black RTV to seal these block off plates (not included with the kit) or the original gaskets if they are still in good condition.