T04E T3/T4 4-Bolt Stage III Anti-Surge Turbocharger w/Wastegate +Black 30 psi Boost Controller - Turbine A/R .63 Increase Engine Power and Torque Outpout; Maintain Combustion Chamber Pressure and Fuel/Air Load Contructed with High Quality Material; Built for Durability and Strength; Capable of 8 psi or 15-25 psi Output at Peak Power; Internal Wastegate Setting: 8 psi Capable of Boosting Horsepower up to 300+ BHP / Exhaust (Turbo Manifold) Flange: Standard T3/T4 4-Bolt / Exhaust (Downpipe) Flange: 2.5" V-Band Inlet: 3" / Compressor Inducer: 50.55mm / Turbine Exducer: 56.06mm / Turbine A/R: .63 Boost Controller: Made of Aluminum, Adjustable 1-30 psi