Taterbuilt 67/67 he351cw direct bolt on upgrade for the 03-07 cummins. This charger will support up to 775RWHP while spooling close to stock. This turbo works ok on trucks with stock injectors and just intake exhaust and a tuner but we typically recommended a 100hp injectors and strong tunes and UP TO 200hp over stock injectors. This turbo will drop your EGT's 200-400 degrees depending on setup and driving style and habits. This charger gets their 67mm billet compressor wheel and then paired with their custom 67mm 10blade turbine wheel. 360 thrust bearing, along with upgraded bearings and total seal seals inside them and they are balanced to .01 or less imbalance. Wastegate is set to run 40-45psi. Head studs are a good idea and good insurance on your head gasket if you are running larger injectors and this charger. You do not need a tune change to run it. Comes with install gaskets and a 1 year warranty from purchase. CORE MUST BE RETURNED WITHIN 45 DAYS.