The Cycle-Rama CR557 Camshaft is a high-performance cam designed for 2017–2025 Harley-Davidson Milwaukee-Eight engines.
Built for 124-cubic-inch and larger big-bore applications, the CR557 delivers strong mid-range torque and high-RPM horsepower. Its specially designed opening and closing ramps help reduce valve bounce and valve-spring harmonics for improved control at higher engine speeds.

Features
• Fits 2017–2025 Harley-Davidson Milwaukee-Eight models
• Designed for 124-cubic-inch and larger big-bore engines
• Strong mid-range and high-RPM performance
• Operating range of approximately 2,800–6,500 RPM
• Works best with approximately 11.3:1 to 11.8:1 static compression
• Special opening and closing ramp profiles
• Helps reduce valve bounce and valve-spring harmonics
• Replaces the older CR540 and CR540-2 cam profiles
• Ported cylinder heads, larger throttle body, performance exhaust, upgraded fuel system, and custom tuning recommended
• Professional engine building and installation required
This listing is for the camshaft only. Adjustable pushrods, lifters, valve springs, bearings, gaskets, and other installation components may be required and are sold separately.