That is 3" pipe from the turbo to the back of the truck. At this point I will not be using a muffler, but that will most likely change. I like a nice loud exhaust, but I am also getting kinda old, so I will make that decision then. Since this is on a truck I may be able to get over the rear axle with minimal bends. I am tucking it up as close to the bed as safely possible, which should only require a 30 degree bend to allow axle clearance.Could not tell, but are you using a 3" down pipe all the way to out the back? Will say that turbos really cut the exhaust sound way down. Am running twin turbos with 3 inch down pipes to the ball/socket connectors and then twin 2 3/4" exhausts with H-pipe to twin turbo mufflers (minimal back pressure). Then twin 2 1/2 mandrel bends over the axle. This setup sounds real good, but not nearly as loud as with the ProCharger. Think you would be disappointed with a stock muffler which increases back pressure.