COMETIC Top End Gasket Kit - 97 mm - Yamaha C3813

A compromised top end gasket is one of the quickest ways to lose compression, power, and reliability. The COMETIC C3813 Top End Gasket Kit is engineered for high-output 4-stroke engines that demand precision sealing under extreme combustion pressures. Whether you're running naturally aspirated or forced induction, this kit delivers the durability and thermal management your engine needs to perform consistently.

Built with multi-layered steel construction and Viton rubber coating, each gasket in this kit is designed to distribute torque load evenly across the sealing surface, minimizing bore distortion and maximizing piston ring seal. The embossed stainless steel design actively draws heat away from the combustion ring, eliminating hot spots that lead to premature gasket failure. Made in the USA by Cometic, a trusted name in engine sealing.

• Fitment: Yamaha C3813 (97mm)
• Multi-layered steel construction
• Viton rubber coating
• MLS head gasket design
• Embossed stainless steel base
• EST (Extreme Sealing Technology)
• Includes head gasket
• Includes base gasket
• Includes rocker gaskets
• Includes cylinder O-rings
• Heat dissipation optimized
• Rated for boosted engines
• USA manufactured
• Bolt-on installation