Cometic C10321 MLS Head Gasket Pair 4.375" Bore .040" Thickness

The Cometic C10321 Multi-Layer Steel (MLS) head gasket pair delivers professional-grade sealing performance for high-output engines. Engineered with a 4.375-inch bore and .040-inch compressed thickness, these gaskets are designed to handle extreme cylinder pressures and temperatures in demanding applications.

Key Features:

• Multi-Layer Steel construction with multiple embossed layers of stainless steel
• 4.375-inch bore diameter for precise fitment
• .040-inch compressed operating thickness
• Load-controlled embossments for even torque distribution across sealing surface
• Outer layers feature proprietary Viton rubber coating for enhanced sealing
• Reduces bore distortion and improves piston ring seal
• Requires less clamp load than conventional gaskets
• Sold as a pair for complete engine rebuild

Cometic MLS head gaskets are ideal for both aluminum-to-aluminum and aluminum-to-cast iron applications, withstanding the shearing forces created by different material expansion rates. The multi-layer design provides maximum sealing performance without requiring sealants, making them the industry standard for championship-winning racing teams and high-performance street engines.