Cometic C5317-066 GM Gen III/IV MLS Cylinder Head Gasket Bore - LS1/LS2/LS3/LS6 4.130

The Cometic C5317-066 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM LS Gen III and Gen IV small block V8 engines, including LS1, LS2, LS3, and LS6 applications. This precision-manufactured gasket features a 4.130-inch bore diameter and .066-inch compressed thickness, making it ideal for street performance and racing builds requiring enhanced sealing capabilities.

Key Features:

• Multi-Layer Steel construction provides superior sealing under extreme cylinder pressures
• 4.130" bore diameter accommodates stock and mild overbore applications
• .066" compressed thickness for optimal compression ratio tuning
• Compatible with LS1, LS2, LS3, and LS6 Gen III/IV small block engines
• Embossed stainless steel layers with Viton rubber coating for maximum conformability
• Resists combustion pressure and withstands high temperatures
• Requires proper surface preparation with RA finish between 50-60 micro-inches

Cometic MLS gaskets are designed to recover and maintain torque loads better than conventional gaskets, making them the preferred choice for high-performance and forced induction applications. The gasket's multi-layer design allows for engine movement and expansion while maintaining a superior seal across all temperature ranges.