Well, I got all my exhaust on the way, I went with a 3'' DP from Banks and a 4'' system with strait through muffler from the DP back. The 4'' pipe is made for a PSD but the guy I bought it from agreed to sell me everything exept the downpipe and he cut me a deal. T & J Diesel, nice people to work with. I really would have liked to go with the ATS upgrade parts but the pockets were hardly deep enough for this. Does anybody run a system similar to this, just curious as to how it sounds/performs, any turbo noise??