Theres a store in fort worth that sells 6" pipe flared. I believe its called Augbournes truck parts. I just welded a guy an exhaust that was a 5" turbo down pipe to a 6" adapter and 6" pipe from there back turned out in front of the back tire. with a 90. He was very pleased and the sound was deep throaty sound compared to my 4" high pitch sound. We drove it in to weatherford after that and tha truck will probably not hold together very long because it vibrated the hell out the cab.

 

Do you know where that shop is? I googled it and came up with nothing.