Cometic C5321-066 GM Small Block MLS Cylinder Head Gasket Bore - SB2.2 V8 4.125

The Cometic C5321-066 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM SB2.2 Small Block V8 engines. This precision gasket features a 4.125-inch bore diameter and .066-inch compressed thickness, designed to provide superior sealing performance in demanding racing and high-performance applications.

Key Features:

• Multi-Layer Steel (MLS) construction for maximum durability and heat resistance
• 4.125-inch bore diameter optimized for GM SB2.2 Small Block V8 engines
• .066-inch (1.68mm) compressed gasket thickness
• Includes steam holes for proper coolant circulation
• Engineered for high-performance and racing applications
• Superior torque retention and reusability compared to composite gaskets

Cometic MLS gaskets feature multiple layers of stainless steel with a Viton rubber coating that provides exceptional micro-sealing capabilities. The embossed layers allow the gasket to conform to minor surface imperfections while maintaining consistent clamping pressure across the entire sealing surface. This design makes them ideal for engines with increased cylinder pressures from forced induction, nitrous oxide, or high compression ratios.