S&S cams are tested on the dyno, street and racetrack before being offered to the public. With hundreds of test hours on them, you know that you are getting the best cam S&S can produce. Good low and mid-range torque. Bolt-in cam for lower compression motors with compression up to 8.5:1. Recommend hydraulic lifters. Made in the USA. Installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe to case clearance..