Ever since I got the pipe it made my car run hot and inconsistent where it would load up.I tried tuning every way possible but I just got sick of it.I'm glad to hear a few people have gutted the pipe,seems like the best idea to me and it IS gonna be loud,can't wait to hear it.I used the blue RTV gasket stuff but if it melts I'll go to the copper.I didn't think too much about oil in the header if I flipped it so I'll look at doin something else there.