Hey Robert I think the easiest thing to do is a muffler delete ... from what I understand their is no reason for a 4" exhaust until you start upgrading other big money things ... the biggest downfall to our exhaust is that the backpressure from the muffler is to much ... maybe someone will chime in to confirm or say not so much ... I am going to do a muffler delete SOON ... bbl ... going to order the pipe
I am going with the PHP "FU" alot of tunes to choose from and change when needed at home on your time ... 6 positions in the truck and like 15-20 for " "FU" future upgrades ""