Description
The S&S Cycle 640 Cam delivers the cylinder pressure and rpm range serious builders demand from big-displacement Evolution engines. Engineered through hundreds of dyno and track hours, this cam profile prioritizes responsive power delivery and reliable performance across demanding compression ratios. If you’re building a 110″+ engine or pushing 11-12:1 compression on a smaller platform, this is the cam that rewards precision tuning.
- S&S part number 33-5108
- Evolution engine compatible
- For 110″+ displacement engines
- Requires 10.5-11.5:1 compression
- Or 96-107″ engines at 11-12:1
- Hydraulic tappet design
- Fast ramp profile
- Minimal overlap design
- Lower TDC lift
- Requires high-lift springs
- Check coil bind clearance
- Check valve-to-valve clearance
- Check valve-to-piston clearance
- Check cam lobe-to-case clearance
- Dyno and track tested
- Made in U.S.A.
