This pipe uses a regular muffler
http://www.dynamiterc.com/Products/D...ProdID=DYN6624
What I would do is run the pipe with some sort of exhaust deflector out the back over the shock tower (wouldn't look good but will work) and get a Tiger Drive and mount it so you could start the truck from the side. Unless you can get that .21 size pipe to fit along side of the truck without it hitting the front tire. That motor is going to be rather restricted with a smaller pipe.
rolland