Description
Whether you’re prepping for race season or executing a midseason engine refresh, the ATHENA Top End Gasket Kit delivers the precision sealing your engine demands. This kit gives you the flexibility to run either standard fuel with stock compression or step up to race gas with elevated compression ratios—letting you optimize performance based on your specific racing strategy and fuel availability. Choose the gasket configuration that matches your power goals and fuel choice without committing to a single setup.
- Fits: Yamaha P400485600351/2
- Application: Pro, semi-pro, amateur racing
- Top end gasket set
- Supports stock compression (standard fuel)
- Supports elevated compression (race fuel)
- Excludes valve stem seals
- Excludes rubber components
- Excludes fiber gaskets
- Bolt-on installation
- Engine refresh or race prep








