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I just purchased a 2006 Chevy H.D. 2500 Crew Cab Duramax Diesel with the LBZ engine. I would like to put a programmer, air intake system, and new exhaust system. I have very little knowledge to what products will be the best for added horsepower and fuel economy. If anyone has an opinion on what products would be the best I would appreciate it. I noticed that there are not a lot of choices with the 2006 LBZ.