Cometic C5331-050 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - 4.630

The Cometic C5331-050 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines with a 4.630-inch bore diameter. This .050-inch thick gasket provides exceptional sealing capability and durability in demanding performance applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and combustion chamber integrity
• .050-inch (1.27mm) compressed thickness for precise compression ratio tuning
• 4.630-inch bore diameter fits standard and performance Big Block builds
• Engineered specifically for Chevrolet Mark IV Big Block V8 engines (396, 402, 427, 454, 502)
• Viton rubber gasket coating provides enhanced sealing and resistance to fluids
• Stainless steel construction withstands extreme cylinder pressures and temperatures
• Eliminates leak paths between cylinder head and block deck surface

Cometic MLS gaskets feature multiple layers of stainless steel with embossed sealing beads that compensate for minor surface imperfections and provide consistent clamping pressure across the entire sealing surface. The advanced design allows for slight movement between layers to absorb vibration and thermal expansion, making these gaskets ideal for boosted, nitrous, and naturally aspirated high-performance applications. Proper surface preparation (RA finish of 50-60 recommended) ensures optimal gasket performance and longevity.