General description Upgrade your Subaru Impreza WRX STI with the TD05-20G Turbocharger, designed for EJ20 and EJ25 engines from 2002 to 2006. This turbocharger features a billet compressor wheel and is capable of delivering up to 380 HP. Please note that WRX Wagon engines and automatic sedan engines originally come with a TD04 model, while manual WRX sedans, including STI versions, are equipped with a TD05 model. If your original turbo is a TD04, some modifications (connections, bolts, fixed screws, etc.) will be necessary for installation. Technical specifications Exhaust Outlet Flange: 5-Bolt Flange Exhaust Inlet Flange: 3-Bolts Flange Turbine Trim: 76.4 Turbine Housing: 7cm² Turbine Inducer Diameter: 56mm Turbine Exducer Diameter: 48.96mm Compressor Trim: 59.8 Compressor Inducer Diameter: 52.6mm Compressor Exducer Diameter: 67.9mm Compressor Housing Inlet OD: 57.8mm Oil Feed: M10*1.5 Oil Drain: M15 & 2*M6H Water In/Out: M14*1.5 Compressor housing inlet OD: 57.8mm, ID: 53.62mm