Cometic C8857 MLS Head Gasket Bore - 030 102mm Pair

The Cometic C8857 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket designed for demanding engine applications. This gasket pair features a .030" compressed thickness, making it ideal for high-compression builds where precise deck height control is critical.

Multi-Layer Steel Construction:

• Constructed from multiple embossed layers of stainless steel for superior strength and durability
• Outer layers feature Viton rubber coating bonded at .001" thickness for exceptional sealing
• 102mm (4.016") bore size accommodates performance engine configurations
• Non-intrusive rivets securely hold layers together without compromising sealing integrity

Advanced Sealing Technology:

• LCE (Load Control Embossments) promote even torque distribution across sealing surface
• Reduces bore distortion for improved piston ring seal and increased power output
• Viton coating is heat resistant to 482°F (250°C) and handles harsh sealing environments
• Suitable for both aluminum-to-aluminum and aluminum-to-cast iron applications

Installation Benefits:

• No sealants required - gaskets install dry with factory Viton coating
• No re-torque necessary when properly installed on prepared surfaces
• Requires smooth surface finish of 50 RA or finer for optimal sealing performance
• Sold as a pair for complete engine rebuild convenience

Cometic MLS gaskets are engineered to withstand the extreme cylinder pressures, temperatures, and shearing forces generated by high-performance engines. The .030" thickness is specifically designed for high-compression applications - verify piston-to-head clearance (.030"-.032" optimal) before installation.