Description
A properly sealed engine base is non-negotiable for reliable Big Twin performance, and gasket failure leads to oil leakage, contamination, and potential engine damage. The JAMES GASKET Base Gasket eliminates guesswork with a precision-engineered design that seats consistently without requiring additional gasket sealer—saving you time on installation while ensuring a dependable, long-term seal. Built to OEM specifications and manufactured in the U.S.A., this gasket delivers the durability and precision that professional racers and serious DIY mechanics demand.
- Fits Big Twin models
- 3-5/8″ diameter
- No sealer required
- U.S.A. manufactured
- Precision engineered
- OEM-spec design
- Bolt-on installation
- MPN: JGI-16777-66-S









