The Rotrex C38-61 supercharger is the smallest C38 and can fit a wide range of applications. This compact unit is capable of producing up to 550hp, on engine sizes ranging between 2.4-5.0L. Using the patented Rotrex planetary traction drive, the C38-61 has a 7.5:1 drive ratio and can achieve impeller speeds up to 90,000RPM!