I have a afe stage 2 intake, silencer ring removed, and straight 5in exhaust, which I know is way over kill for my application, but I like the way it sounds. Other than that It's stock right now, i will add a tuner in the future, but I want to replace my torque converter and valve body first, I have the 48re, I just want to replace the factory pump and get the added filtration, I read that I may have problems later down the road with the larger 150 and 165 pumps on the stock truck. It's just what I have been told as don't know the reasonig behind it