Cometic C5766-040 MLS Cylinder Head Gasket GM Vortec Gen VII Big Block - 8100 L18 V8

The Cometic C5766-040 is a multi-layer steel (MLS) cylinder head gasket engineered specifically for GM's L18 Vortec 8100 Gen-VII big block V8 engines. This precision-manufactured gasket features a .040" compressed thickness and a 4.450" bore diameter, designed to provide superior sealing performance in high-performance and heavy-duty applications.

Key Features:

• Multi-Layer Steel (MLS) construction for maximum durability and heat resistance
• .040" (1.02mm) compressed gasket thickness for optimal compression ratios
• 4.450" bore diameter precision-matched to L18 Vortec 8100 specifications
• Left-hand side (LHS) application for driver's side cylinder bank
• Designed for GM Gen-VII big block V8 engines including Vortec 8100 and 8.1L applications
• Embossed stainless steel construction with advanced sealing technology
• Excellent resistance to combustion pressure and thermal cycling

Cometic's MLS gaskets are constructed from multiple layers of embossed stainless steel, providing superior recovery and rebound characteristics compared to traditional composite gaskets. This design ensures consistent clamping pressure across the entire sealing surface, even under extreme cylinder pressures and temperatures. Ideal for performance builds, marine applications, RVs, and commercial trucks equipped with the legendary 8.1L big block engine.