Cometic C5402-027 MLS Cylinder Head Gasket Bore Thick Chevy Small Block - 4.160 027

The Cometic C5402-027 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines. This high-performance gasket features a 4.160-inch bore diameter and a compressed thickness of .027 inches, making it ideal for performance builds requiring precise combustion sealing.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme cylinder pressures
• 4.160-inch bore diameter accommodates oversized pistons in performance applications
• .027-inch compressed thickness allows for fine-tuning compression ratios
• Undersized water ports designed for aftermarket cylinder heads, enabling custom port matching and coolant flow optimization
• Embossed stainless steel layers with Viton rubber coating ensure maximum combustion seal and fluid containment
• Excellent recovery characteristics handle thermal expansion and contraction cycles

Cometic MLS gaskets are the preferred choice for high-performance and racing applications where reliability and consistent sealing are critical. The undersized water port design gives engine builders the flexibility to match ports precisely to their specific aftermarket heads, optimizing coolant flow while maintaining structural integrity around the combustion chamber.