Cometic C5712-056 Pontiac MLS Cylinder Head Gasket Bore - 400/428/455 V8 4.300

The Cometic C5712-056 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Pontiac 400, 428, and 455 cubic inch V8 engines. This gasket features a 4.300-inch bore diameter and a compressed thickness of .056 inches, making it ideal for performance builds and engine rebuilds requiring precise sealing and durability.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and combustion pressure containment
• 4.300-inch bore diameter accommodates stock and slightly oversized cylinder bores
• .056-inch compressed gasket thickness allows for precise compression ratio tuning
• Designed specifically for Pontiac 400, 428, and 455 V8 engines
• Engineered to withstand extreme temperatures and pressures in performance applications
• MLS design allows for minor head and block surface imperfections while maintaining seal integrity

Cometic MLS gaskets are the preferred choice for engine builders and performance enthusiasts who demand reliable sealing in high-performance and racing applications. The multi-layer construction combines multiple layers of stainless steel with advanced coating technology to create a gasket that adapts to engine movement and thermal expansion while maintaining a positive seal.