S S 640 CAM 84-99 EVO

640 Cam

• 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
• For large displacement engines (110"+) with 10.5 to 11.5:1 compression and smaller engines (96-107") with 11 to 12:1 compression
• Requires high-lift springs
• Less overlap and fast ramps build higher cylinder pressure
• Lower TDC lift makes installation easier
• Designed for use with hydraulic tappets
• Installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe to case clearance.
• Made in the U.S.A.