F-1X and F-2 SERIES Superchargers – 1600+ HP The ProCharger F-2 features a larger, 10.5-inch volute diameter and provides a significant increase in airflow when compared with the F-1/F-1A and F-1C/F-1R superchargers. Considered by many to be the ideal combination of small size and high performance, the F-2 retains all the F-Series design advantages, including self-contained oiling, the patented, ultra-high speed compound bearing assembly, precision ground 9310 steel gears and can support up to 1,600 horsepower.