i recently got a hold of a 05 2500 hd 6.0L, enjoying the hell out of it. havent done anything to the engine yet but thats why im here. i put some 20s on it with some cooper A/Ts on it, its 2wd so i leveled it. exhaust and k&n air is all i have done so far, and put some sound in it. (pic posted is a little old)