The Rotrex C38-92 supercharger is the Big Boy C38 and can fit a wide range of applications. This compact unit is capable of producing up to 650hp, on engine sizes ranging between 2.4-6.0L. Using the patented Rotrex planetary traction drive, the C38-92 has a 7.5:1 drive ratio and can achieve impeller speeds up to 90,000RPM!