Cometic C15680-040 MLS Cylinder Head Gasket Chevy Big Block Bore - for V8 4.680

The Cometic C15680-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered for Chevrolet Mark IV and GM Gen V/VI Big Block V8 engines. This precision gasket features a .040" compressed thickness and is designed to accommodate a 4.680" round bore configuration.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme conditions
• .040" compressed gasket thickness for precise compression ratio tuning
• 4.680" round bore diameter for optimal fitment
• Engineered specifically for Chevrolet Mark IV and GM Gen V/VI Big Block V8 engines
• High-temperature resistance withstands the demands of performance and racing applications
• Eliminates bore distortion and maintains consistent clamp load

Cometic's MLS gaskets utilize multiple layers of stainless steel with advanced coating technology to create a superior seal that compensates for thermal expansion and surface imperfections. This gasket is ideal for street performance, racing, and high-boost applications where reliability is critical. The round bore design ensures proper combustion chamber sealing while the .040" thickness allows builders to fine-tune compression ratios for optimal engine performance.