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Cometic C5639-120 GM/Mercury Marine Gen-IV Big Block MLS Head Gasket Bore - V8 4.530

Manufacturer

Picture for manufacturer Cometic

Part Number

C5639-120
7 reviews
Sale Price

$228.77

Estimated ship date Thursday, November 26

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Product Details

The Cometic C5639-120 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM and Mercury Marine 1050 Gen-IV Big Block V8 engines. This precision-manufactured gasket features a 4.530-inch bore diameter and a .120-inch compressed thickness, providing exceptional sealing performance in high-performance marine and automotive applications.

Key Features:

  • Multi-Layer Steel (MLS) construction for superior sealing and durability
  • 4.530-inch bore diameter designed for Gen-IV Big Block V8 engines
  • .120-inch (120 thousandths) compressed gasket thickness
  • Includes two slotted lifter valley bolt holes for proper engine assembly
  • Compatible with GM and Mercury Marine 1050 Gen-IV applications
  • Engineered to withstand extreme cylinder pressures and temperatures

Cometic's MLS gaskets utilize multiple layers of stainless steel with advanced coating technology to ensure optimal combustion sealing, even in demanding marine environments. The precise bore dimension and thickness make this gasket ideal for performance rebuilds and custom engine applications where exact specifications are critical.

Products specifications

Prop 65

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

Material

Multi-layer Steel

Easy with great prices

Very fast shipping, received it Monday when I ordered it on Thursday. Thanks!

best price online. fast shipping and wright part. I recommend this site to anyone!

Happy with the purchase! The lowest price and fast shipment.

fast

Best price online for an Injen intake. Arrived in a week. Appreciated the "Item shipped" email with tracking number!

I ordered a water pump from them and that Amazon was advertising as a Chrome pump. When I discovered it was not chrome, I asked to cancel the order which was prior to shipping notification. I was told by customer service it had already been sent and I would have to wait until the item was sent for a return to be processed. The return was sent back and all money was credited to my account as promised.

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