For my Duramax:
Added 100HP and 220ft-lbs! Woke the ol' beast up quite a bit - so much that it can spin the tires when I roll into it at 40mph!
I really think the Duramax tuned might be as fast as my E55 was stock!
Boosted 4WD launches are nutso. It spun all 4 of my 38x15.50 tires through an intersection earlier! Can't wait till I have my first run in with a ricer.... Should be interesting.