OK. Here's the deal.......Tomorrow i'm getting my exhaust redone. The dude that's doing it is weldin up some 2.5 pipe, no cat. 150 for parts and labor and I have to buy the muffler. My only option at last minute is the Dynomax super turbo. I've heard it on a 4 banger, sounds like shit. I have a 6 cyl........what should I tell the dude to do for best sound?