These thing are just simply awesome. It was hard finding them since only a few vendors carry them (got mine from Nino's!) but it was definitely worth the search and wait. They come with cats on them, so there's no real worry about passing emissions. The downpipe features a bellmouth opening and everything's 3", meaning it will only bolt up to your cat-back that has 3" piping. Everything's SS and perfect. I love this stuff. Just giving you guys the heads up on a great downpipe and midpipe.