S&S Camshaft - 561 - Evolution Big Twin

The S&S Camshaft adds power and throttle response with a performance cam profile built for your engine.

This is the 561 Series grind. See the cam specs for lift, duration and valve events, and confirm your engine's compression and valvetrain are matched to the cam before installing.

Fits Harley-Davidson models from 1984-1999. Check the fitment chart below to confirm your exact year and model.

• 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 80"-96" engines at 9.5:1-10.5:1 compression ratio
• Provides strong midrange power, 3000-5500 rpm
• Works with hydraulic tappets
• Requires high-lift springs
• Spring spacing required
• Made in the USA
• Installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe to case clearance.