well, if some of you remember, i was going to supe up my 2002 chevy 2500HD Duramax. well, yesterday was the day for the install, and i cant beleive how powerful my truck now is. if any of you have a duramax or powerstroke, i highly recommend putting the banks exhaust on. it makes the truck sound sweet. I put a k&N fipk intake in, the Edge "Juice" and a banks 4 inch turbo back exhaust. You can do burnouts with no problem now . I cant beleive what a difference the box makes. I smile everytime i hit the gas.