PSR PRO98 HP Rating 2550 Dual ceramic ball bearing system provides optimal turbo response &better durability by reducing the shaft-motion 13 Blade G-Aero billet compressor wheel 98mm inducer produces up to 2550 hp 9 Blade G-Aero Inconel 713c turbine wheel with more turbine flow Fin cooled aluminum center housing, lighter weight Anti-Surge ported-shroud compressor inlet, cover integrated with the speed sensor port Installation Hardware: 4?? flange kit for Comp. Outlet, T6 Gasket/3.5?? flange kit for Turb. Inlet,?5?? flange kit for Turb. Outlet and oil Drain Fitting kit are included by default Oil Feed Fitting(-4AN ? 1.65mm (0.065??) Orifice) included Compressor Housing: W/O Compressor Housing Turbine Housing: W/O Turbine Housing Compressor Wheel: 98.4*133.5*142.4mm Turbine Wheel: 118*112mm Compressor Inlet: 6” Hose Compressor Outlet: 4” V-band Compressor Housing A/R: 0.96 Turbine Inlet: 3.5” V-Band (DV Housings) or T6 Open Turbine Outlet: 5” V-Band Turbine Housing A/R: 1.09/1.25/1.41 Oil Feed: See graph below(OIL INLET) (an oil restrictor with ~1mm orifice is highly recommended) Oil Drain: See graph below(OIL OUTLET)