Perfect match for my k20a2 engine with RBC intake manifold. struggled with a vacuum leak and couldn't figure out why my car was swaying at idle for a long time. I used these thermoplastic pads which are supposed to help with heat dissipation, yes all they did was air leakage. So took it off and used this gasket, the problem was solved. Sealed and fixed the leak with IAC cleaning. Definitely recommend. Throw away those thermal pads, yes they can be reusable but junk. If you have a fluctuating…