hello all. im new to the diesel world i bought my 06 chevy hd 2500 and i absolutely love for the first week since i own i slept in it the entire week haha.but lets get down to business i have mrbp exhaust on it 5" to ^" tip and i lost mileage :( why is that ? go to big ? and i wanna bump some horse on me truck any suggestions? best stuff to buy? and should i replace my exhaust plz help........plz:mad:

Your right foot is too big. :)

Some type of programmer would be a good start.

Programming is the next step. Our top seller by far is the edge Evolution RACE module which has 7 settings from stock all the way up to 165+ HP. Mileage gains range anywhere from 1-3 MPG. Here is some more info on it:

Edge Evolution RACE (http://performancetruckproducts.com/Diesel-Power/GM-Duramax/06-07-LLY-LBZ-Duramax/Electronic-Performance/Edge-Products-RACE-Evolution-06-09-LLY/LBZ/LMM-Duramax.html)