Boost Lab VF48 Subaru STi Upgrade TurbochargerBillet Compressor Wheel | Direct Replacement for 08-21 Subaru STi | Perfect Upgrade for 02-07 WRX & 04-07 STiThe Boost Lab VF48 is a direct replacement turbocharger for the 2008 through 2021 Subaru WRX STi. In addition, this unit is a perfect direct fit upgrade for the 2002 through 2007 Subaru WRX. This model features an upgraded billet compressor wheel that produces an additional 10% flow horsepower compared to the factory cast wheel.All Boost Lab turbochargers are VSR balanced & tested and come with an industry standard 1 year/unlimited mile warranty. Specifications:Compressor Wheel: Billet 46mm/59mmTurbine Wheel: 53mm/48mmBearing Type: Twin Hydrodynamic Journal Bearing w/ 360* ThrustFitment: Direct Replacement for 2008-2021 Subaru WRX STiAdditional Fitment: 2002-2007 Subaru WRX & 2004-2007 WRX STi