Cometic C9635-045 EST Top End Gasket Kit Evolution Big Twin .045" Head Gasket

The Cometic C9635-045 is a complete EST (Extreme Sealing Technology) top end gasket kit designed for 1992-1999 Harley-Davidson Evolution Big Twin engines with standard 3.500" bore. This comprehensive kit includes a .045" thick multi-layer steel (MLS) head gasket, along with all necessary gaskets, seals, and O-rings for a complete top end rebuild from the cylinder base upward.

EST Technology Features:

• Embossed stainless steel head, base, and rocker gaskets covered with proprietary rubber material
• Multi-layer steel head gasket construction with viton-coated outer layers for superior sealing
• .045" head gasket thickness allows for compression ratio tuning and precise quench control
• Advanced heat dissipation design draws heat away from combustion ring evenly across gasket surface
• Eliminates hot spots and prevents gasket failure under extreme conditions

What's Included:

• MLS cylinder head gaskets (.045" thickness)
• Cylinder base gaskets
• Rocker box gaskets
• All necessary seals and O-rings
• Complete hardware for top end rebuild

Cometic's EST gasket kits are engineered for both performance and reliability, featuring multi-layer construction that provides excellent conformability to head and cylinder surfaces while maintaining superior sealing integrity. The .045" head gasket thickness is ideal for builders looking to fine-tune compression ratios or accommodate specific piston deck heights. Made in the USA with precision manufacturing for consistent quality and reliable performance.