Whats up fellas... New to the duramax world.. I just purchased a 04 4door 4wd.. I am wanting to put some stuff on it but don't know whats best for the duramax. Just got rid of the powerstroke so not to knew to diesel performance. The truck has 4inch mbrp and a 5inch tip so far.. Was thinking about an afe stage 2 intake system.. Whats the best programmer to put on it? Buddy of mine has a 05 with 4inch exhaust afe stage 2 and the banks 6 gunner system and it moves pretty good!! Looking to out run him :rockwoot: