I hafta agree with BroncoBill, having a loud exhaust is nice except when the Man has pulled you over for excessive exhaust noise and then he begins to tear your truck apart looking for other rolling violations. My brother's 78 HighBoy F250 we ran straight pipes off the headers on the 460 and it sounded sweet, but between county mounties and state troopers, we were on the road side damn near every weekend with a tape measure next to everything they could think of to try and get us on. My opinion, for what it's worth, is to go with something like a FlowTech Afterburner or a FlowMaster 40 or 50 series that will hum at speed and crackle when you stand on it. Our craft is coming under more and more scutiny from the tree huggers and the lawman, why draw even more attention to it for the sake of an ego trip?