I had a question, i need to get a B series turbo manifold and downpipe for my 91 LS, www.ssautochrome.com makes them, says you can retain your A/C, i was just wondering if these guys make good manifolds or not. They charge 425$ for manifold and downpipe combo. Not sure if thats a great price either. but any help or suggestions on where to buy is appreciated. Thanks