Turbo Cartridge CHRA Core for 2.5L Vehicles 2004-2007 Fitment Compatible with WRX STI models equipped with 2.5L engine Compressor Wheel Diameter 46 / 59 mm Turbine Wheel Diameter 47 / 51 mm Turbine Flange Type designed for specific flange configuration Downpipe Flange Type features 5 bolt pattern Nozzle Area measures 7cm Rated for Horsepower range of 300HP - 320HP Equipped with Journal Bearing type Core assembly includes all necessary internal components Designed for direct replacement Multiple part numbers available for compatibility Ensure existing turbo part number matches one listed prior to installation Installation recommendation is to use a qualified technician Core unit is balanced at factory standards Packaging includes only the turbo cartridge core as shown Condition is with standard factory finish Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.