I have 2 chamber flows, and plan on getting my new exhaust done by next week. Which should I go with? Prochamber or Mac offroad h-pipe? I have heard the offroad h-pipe on a friends stang liked it quite a bit. But I keep hearing alot of good stuff about the Prochamber... I don't want the tin can sound that I heard before form some stangs, not sure what pipe, they had that sounded like that...