I was wondering the same thing. I happen to like the diesel noise! If I ever buy one, first thing to go would be the exhaust and most of the eng. compartment insulation! Wonder what that SST (Single Sequential Turbo) will sound like?Did anyone watch the video of "voice of the driver". At 1:14 it shows the difference in clatter. So maybe with some tuning we could have our old diesel sound in a brand new truck.