thanks Geek, I found out about the missing pipe. <img src="/forums/images/graemlins/frown.gif" alt="" /> Maybe can add one later. Just installed the downey last night. WoW,what a difference. you can really hear her suck wind now!<img src="/forums/images/graemlins/shocked.gif" alt="" />It also helped open up the Flowmaster a bit w/some better tone. I don't believe you can measure horses with your foot but If I were to guess I'd say overall a 5-8% gain w/new intake and Perf.muff. -KnN...I believe! <img src="/forums/images/graemlins/kewl.gif" alt="" />