I just bought a 02 dodge 5.9 cd. It has air dog installed on it a 5inch straight exaust and a cold air intake and a new turbo. I don't know of anyhing else done to it. Whats my next upgrade need to be. I ordered a boost controler. I figured with the 5inch exaust and intake i could handle more boost. I new to this an just wanted others opion. Thanks Chris.