Cometic C5333-040 GM Gen V/VI Big Block MLS Cylinder Head Gasket Bore - V8 4.540

The Cometic C5333-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM Generation V and Generation VI Big Block V8 engines. This precision gasket features a 4.540-inch bore diameter and a compressed thickness of .040 inches, providing an excellent balance of sealing and compression ratio control.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• .040-inch compressed thickness for precise compression tuning
• 4.540-inch bore diameter optimized for big bore applications
• Designed for GM Gen V/VI Big Block V8 engines
• Multiple layers of stainless steel with active sealing technology
• Excellent thermal conductivity and heat resistance
• Resists blowout and seepage under extreme conditions

Cometic MLS gaskets use multiple layers of stainless steel with proprietary coatings to create a superior seal that adapts to imperfect sealing surfaces. The embossed sealing beads provide active sealing pressure around combustion chambers, oil passages, and coolant ports. These gaskets are ideal for high-performance street engines, race applications, and forced induction setups where maintaining a reliable head seal under extreme cylinder pressures is critical.