Description

Camshaft – 640 Series – Evolution Big Twin ’84-’99

• For large displacement engines 110″ and larger with 10.5:1 to 11.5:1 compression and smaller engines, 96″-107″ with 11.0:1 to 12.0:1 compression
• Less overlap and fast ramps build higher cylinder pressure
• Lower TDC lift makes installation easier
• Designed for use with hydraulic tappets
• Made in the USA
• Installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe to case clearance.
• Requires high-lift springs.