Hey JC, Couldnt tell if you have short bed or not,but if you do,duals can be a real PITA. Me and rip rook had a hard time with the clearance on my SB. I ended up taking my spare out and putting it under my hard bed cover. My duals come out behind the rear tire at an angle,as I didnt want the smoke and the sound hitting my camper. I went with an Allied truck muffler and no res. It sounds good but not too loud. You can hear the turbo whine pretty good ! I basically went from one of Rips 4" exhaust into the muffler and out into two 3" tail pipes with two stainless tips from rip. Rip really went out of his way to make sure everything worked out,at one point talking to my exhaust installer on the phone on his(rips) dime !!