Cometic C15513-040 MLS Cylinder Head Gasket for Chevrolet Big Block Mark IV - V8

The Cometic C15513-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines. This precision-machined gasket features a .040" compressed thickness and is designed to handle the extreme pressures and temperatures of high-performance and racing applications.

Key Specifications:

• Bore Size: 4.580 inches with valve pocketed design
• Compressed Thickness: .040 inches (40 thousandths)
• Multi-Layer Steel (MLS) construction for superior sealing
• Engineered for Chevrolet Mark IV Big Block V8 engines
• Valve pocketed bores accommodate larger valves and high-lift camshafts

Features and Benefits:

• MLS construction provides maximum combustion seal under extreme cylinder pressures
• Maintains clamp load and sealing integrity through heat cycling
• Eliminates the need for re-torquing after initial installation
• Superior recovery properties compensate for minor surface imperfections
• Ideal for boosted, nitrous, and naturally aspirated performance builds

Cometic MLS gaskets are the industry standard for serious engine builders and racers who demand reliable sealing performance in high-stress applications. The valve pocket design accommodates modified cylinder heads with larger valves, making this gasket suitable for stroker builds and race engines with aggressive valve train components.