Description
A quality cylinder head kit is fundamental to unlocking your Big Twin’s full potential—whether you’re building a stroker, upgrading an aging engine, or restoring a classic. The S&S Cycle 90-1497 arrives completely assembled with premium components, eliminating the guesswork and machine work typically required for a quality refresh. This is a bolt-together solution that lets you focus on final assembly rather than sourcing individual parts and specifications.
What sets this kit apart is the attention to detail: valve springs rated for .590″ lift, precision-machined valve guides, and OEM-compatible manifold mounting. You’re getting a complete, engineered system rather than a collection of aftermarket pieces. Installation is straightforward for experienced builders, and the inclusion of gaskets and hardware means fewer trips to the parts counter.
- Big Twin application
- Completely pre-assembled
- Precision valve seats
- .590″ lift springs
- Stainless steel valves
- Hardened valve guides
- Valve seals included
- Rocker cover gaskets
- Head gaskets included
- OEM manifold compatible
- Complete hardware kit
- U.S.A. manufactured
- Instruction manual included
