Description
Stock cam timing and lift limitations leave power on the table—the S&S 551 Series addresses this with higher valve lift and optimized cam events that unlock additional horsepower across the powerband. This bolt-in upgrade replaces critical engine internals with purpose-built S&S components, eliminating weak points like factory cam chain tensioners and delivering the reliability demanded by serious riders. Whether you choose gear-drive or chain-drive configuration, you’re investing in U.S.-manufactured precision engineering that transforms engine breathing and performance.
- Increased valve lift
- Optimized cam timing
- Bolt-in installation
- S&S Quickee pushrods
- No rocker cover removal
- Replaces stock cams, tensioners, tappets
- New oil pump included
- New cam support plate
- Gear-drive option available
- Hydraulic chain tensioners (chain-drive)
- Improved valve timing stability
- Extended chain life
- U.S.A. manufactured
- MPN: 310-0815
