S&S Cams are tested on the dyno, street and track before being offered to the public. With hundreds of hours of testing on each cam, you know you are getting the best cam S&S can produce. S&S' best bolt-in cam. Works with stock pushrods, springs and hydraulic tappets. Ideal for engines to 96" up to 10:1 compression. No spring spacing required. Made in the U.S.A.. Installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe to case clearance..