Description
A transmission filler plug o-ring might seem like a minor component, but it’s critical to preventing fluid leakage and maintaining proper transmission pressure in your Big Twin engine. JAMES Gasket’s replacement o-ring ensures a reliable seal that keeps your transmission fluid where it belongs—inside your cases, not on your garage floor. This U.S.A.-made part is an essential maintenance item for any serious Big Twin builder or long-term owner.
- Big Twin fitment
- Replacement o-ring only
- JAMES Gasket manufacture
- Made in U.S.A.
- OEM-equivalent quality
- Bolt-on installation






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