Just picked one of these bad boys up and looking to get some performance out of it. My Main concern is gas milage. I am running 35" tires on it now but sooner or later will be looking at 38's on 18" rims. Anyways. Wondering what chip system works best, exhaust, intake, any other ideas you think work best and what your truck runs or gets with that stuff on there. Any help would be great thanks guys.