Description
Upgrading your Big Twin valve springs is essential for maximizing cam performance and preventing valve float at high RPMs. The S&S CYCLE Valve Spring Kit delivers the seat pressure and durability needed to reliably handle aggressive cam profiles while maintaining precise valve timing. Built with precision-engineered components and U.S. manufacturing standards, this kit ensures your engine’s top-end integrity during sustained high-performance operation.
- Fits Big Twin models
- Supports .550″ maximum lift
- 140-lb. seat pressure
- Includes aluminum top retainers
- Springs and retainers included
- Made in the U.S.A.
- 48-65 Panheads require rocker clearance modification
- Bolt-on installation
- MPN: 90-2053
