Cometic C5985-051 GM MLS Cylinder Head Gasket Bore Thick - LS9/LSA 4.100 051

The Cometic C5985-051 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM LS9 and LSA Gen-4 small block V8 engines. This high-performance gasket features a 4.100-inch bore diameter and .051-inch compressed thickness, making it ideal for supercharged applications and high-boost builds.

Key Features:

• Multi-Layer Steel (MLS) construction with multiple layers of stainless steel for superior strength and conformability
• 4.100-inch bore diameter designed for LS9/LSA applications
• .051-inch compressed thickness (MLX designation)
• Viton rubber beading around combustion chamber and fluid passages for exceptional sealing
• Engineered for right-hand side (RHS) cylinder bank configuration
• Superior resistance to extreme temperatures and pressures found in supercharged engines
• Allows for thermal expansion and contraction without failure
• Reusable design reduces long-term maintenance costs

Cometic MLS gaskets are the industry standard for high-performance and racing applications, providing a reliable seal in demanding conditions where stock gaskets would fail. The multi-layer construction allows each layer to move independently, accommodating block and head distortion while maintaining a perfect seal.