PSR Forward Rotation 5449G Dual Ball Bearing Turbocharger HP Rating 660 Dual Ceramic ball bearing system provides optimal turbo response & better durability by reducing the shaft-motion 9 Blade G-Aero Billet Compressor Wheel with Extended Tapered Tip Technology 9 Blade G-Aero Inconel 713c Turbine Wheel Anti-Surge ported-shroud compressor inlet, cover integrated with the speed sensor port Internally Wastegated, Billet Actuator (Working pressure 12 psi) Compressor Housing: W/O Compressor Housing Turbine Housing: W/O Turbine Housing Rotation: Forward Compressor Wheel: 54*67mm Turbine Wheel: 54*49mm Compressor Inlet: 3″ Hose Compressor Outlet: 2″ Hose Turbine Inlet: 2.5″ V-Band, T35 or T3 Turbine Outlet: 3″ V-Band Water Ports: -6AN Oil Feed: -4AN to the Oil Restrictor Oil Drain: Std T3 Oil Drain Flange Boost Reference Port: 1/8-27 NPSF