Basically what I'm saying is that although the manifold may get hot and heat the intake air a bit, it is still better to locate your air filter at the coldest possible location than just leaving it in a hot area of the engine bay. Sometime I'll get around to measuring the manifold temperatures with my CAI and factory airbox, so I can provide some firsthand numbers. It might take a little while however, I'm pretty busy during the days right now.