Cometic Top End Gasket Kit for Honda, 68 mm (C3171-EST)

The COMETIC C3171-EST Top End Gasket Kit is designed for Honda 4-stroke engines requiring dependable sealing during top-end service or rebuild work. This complete kit includes the correct base gasket, head gasket, cylinder O-rings, rocker gasket, and other application-specific O-rings or seals needed for top-end removal and installation. The kit helps simplify assembly by providing the essential sealing components in one package, reducing the need to source individual gaskets separately.
The MLS head gasket uses a multi-layered steel construction with embossed outer layers and a proprietary Viton rubber coating. This design promotes even torque distribution across the sealing surface, helping minimize bore distortion and support improved piston ring sealing. The gasket material also helps draw heat away from the combustion ring and distribute it evenly across the gasket surface, reducing hot spots and helping prevent gasket failure in high-output applications.
COMETIC EST, or Extreme Sealing Technology, combines embossed stainless steel head, base, and rocker gaskets with a specialized rubber coating for reliable sealing under demanding operating conditions. Built for today’s high-horsepower, high-cylinder-pressure engines, the C3171-EST kit is suited to naturally aspirated and boosted 4-stroke machines. Manufactured in the USA, this gasket kit provides the precision and durability needed for professional repairs, performance builds, and routine engine maintenance.

Features:

• Complete top-end gasket kit with base gasket, head gasket, cylinder O-rings, rocker gasket, and application-specific seals

• MLS head gasket construction promotes even torque loading across the sealing surface

• Embossed multi-layered steel design helps reduce bore distortion and support piston ring sealing

• Viton rubber coating provides dependable sealing for high-output 4-stroke engines

• EST construction helps dissipate heat evenly and reduce hot spots across the gasket surface

• Designed for naturally aspirated and boosted high-horsepower, high-cylinder-pressure engines

• Made in the USA

Ships from Parts Unlimited.