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Cometic C5640-030 GM/Mercury Marine Gen-IV Big Block MLS Cylinder Head Gasket - V8

Part of: Cometic GM Big Block MLS Cylinder Head Gasket Bore

Other options in this family: Cometic C5334-040 Cometic C5333-089 Cometic C5755-080 Cometic C5817-040 Cometic C5640-070

Manufacturer

Picture for manufacturer Cometic

Part Number

C5640-030
6 reviews
Sale Price

$100.59

Estimated ship date Tuesday, November 24

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Product Details

The Cometic C5640-030 is a premium multi-layer steel (MLS) cylinder head gasket engineered specifically for GM and Mercury Marine 1050 Gen-IV big block V8 engines. This gasket features a compressed thickness of .030 inches and is designed to accommodate a 4.580-inch bore diameter, making it ideal for high-performance marine and automotive applications.

Key Features:

  • Multi-layer steel construction for superior sealing and durability
  • .030-inch compressed gasket thickness for precise compression control
  • 4.580-inch bore diameter fits Gen-IV big block configurations
  • Includes provisions for two slotted lifter valley bolts
  • Designed for GM and Mercury Marine 1050 Gen-IV applications
  • Cometic's proven MLS technology resists gasket failure and maintains seal integrity under extreme conditions

Cometic MLS gaskets feature multiple layers of stainless steel with unique coatings that provide exceptional conformability to sealing surfaces while maintaining strength under high cylinder pressures and temperatures. This gasket is an excellent choice for performance builds, marine engines, and applications requiring reliable head sealing.

Products specifications

Prop 65

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Material

Multi-layer Steel

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