The V-4 is designed with the serious racer in mind. When operating at 12 PSIG, this model is nearly twice as efficient as a Roots-type supercharger. The V-4 is capable of producing CFM flow levels in the 2,000 range, up to 32 PSIG of boost and horsepower potential up to 1,400. All units feature our exclusive D-port volute for improved efficiency and utilize extra wide, heavy duty design gears. The heavy duty (H/D) configuration includes high-speed, ceramic hybrid ball bearings, ideal for race applications, i.e. cog pulley/Gilmer drive. Performance Specs Max Speed: 58000 RPM Max Boost: 28 PSI Max Flow: 1600 CFM Max Power: 1100 HP Peak Efficiency: 74%