Cometic C15427-058 GM MLX Cylinder Head Gasket Bore - LT1/L86/L87 4.125

The Cometic C15427-058 is a high-performance Multi-Layer Steel (MLX) cylinder head gasket engineered specifically for GM LT1, L86, and L87 engines. This precision gasket features a 4.125-inch bore diameter and 0.058-inch compressed thickness, designed to provide superior sealing under extreme combustion pressures and temperatures.

Key Features:

• Multi-Layer Steel (MLX) construction for maximum durability and reliability
• 4.125-inch bore diameter optimized for GM LT1/L86/L87 engine blocks
• 0.058-inch compressed thickness for precise compression ratio tuning
• Advanced coating technology ensures superior sealing and prevents micro-leaks
• Withstands extreme cylinder pressures in boosted and high-compression applications
• Embossed stainless steel layers with expanded graphite facing material

Cometic MLX gaskets are the gold standard for performance and racing applications, providing exceptional conformability to head and block surfaces while maintaining consistent clamping force. The multi-layer design allows controlled movement between layers to accommodate thermal expansion while preventing combustion gas leaks. Ideal for street performance builds, forced induction setups, and competitive racing engines.