Im looking to buy a newer Duramax and have some questions. 1 Will I loose warranty if I alter anything? And 2 If i do take the emmision stuff off will truck run well. Ive owned some semis but never a diesel pickup. I do know that the emmision shit on newer semis makes them run like shit such as the ISX Cummins with thr burner and The DEF on the 60 Series.Thanks!