Description
A proper seal between your tappet block and engine case is critical to maintaining oil pressure and preventing leaks during high-performance operation. This James complete gasket kit eliminates the guesswork of sourcing individual seals and O-rings, giving you everything needed for a cam change or full top-end rebuild in one organized package. Choosing a quality gasket set upfront saves time, reduces the risk of mixing incompatible components, and ensures your Big Twin engine stays sealed tight.
- Fitment: Harley-Davidson Big Twin
- Part Number: JGI-18634-48-C
- OEM Reference: 18634-48-C
- Application: Front Tappet Block
- Kit Type: Complete seal/O-ring set
- Packaging: Pre-assembled, display-ready
- Origin: Made in the U.S.A.
- Installation: Bolt-on replacement
- Use Case: Cam changes, rebuilds









