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Cometic GM/Mercury Marine 1050 Gen-IV Big Block V8 .080in MLS Cylinder Head Gasket-4.530in Bore

SKU: CGSC5639-080

Head Gaskets

CG Head Gaskets...

Cometic GM/Mercury Marine 1050 Gen-IV Big Block V8 .080in MLS Cylinder Head Gasket-4.530in Bore

SKU: CGSC5639-080

Head Gaskets

CG Head Gaskets...

A$404.64
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel

Product Overview

Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.098". Cometic MLS (Multi-Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two materials. MLS gaskets have increased strength because they are comprised of multiple layers of stainless steel; which also creates the ability to rebound and resist corrosion. The outer layers are embossed and coated on both sides with Viton (a flour elastomer rubber based material that is heat resistant to 250 C/ 482 F). Viton is designed to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes. The center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements.


Features and Benefits

  • Coated On Both Sides w/Viton

Product Details

Description:GM/Mercury Marine Gen-IV Cylinder Head Gasket
Engine Make/Size:GM/Mercury Marine Gen IV Big Block
Part Number:cgsC5639-080
Prop 65 (C, R or CR):CR
Prop 65 - Short Label:Prop_65.jpg
Prop 65 Warning Label:Prop_65.jpg
Prop 65 Yes/No:Yes
Title:Cometic Gasket Automotive GM/Mercury Marine 1050 Gen-IV Big Block V8 .080 in MLS Cylinder Head Gasket, W/2 Slotted Lifter Valley Bolts, 4.530 in Bore
WARNING CA Proposition 65 Message:The state of California has determined that certain chemicals used in the manufacture of this product have been known to cause cancer and birth defects. For more information; visit www.p65Warnings.ca.gov
WARNING CA Proposition 65:Yes

Part Type

Engine Cylinder Head Gasket

Data: v4.2 - Upd: 2026-10-14 00:05:51

Features

  • Coated On Both Sides w/Viton
  • Conforms load distribution across the sealing area
  • Requires less clamp load creating less bore distortion
  • The center or shim layer is an uncoated stainless steel layer which can be varied to accommodate multiple thickness requirements
  • The embossed outer layers of the gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes

Specifications

Product Attributes - Brand
Cometic
Product Attributes - Manufacturer's Part Number
C5639-080
Product Attributes - Part Type
Head Gaskets
Product Attributes - Product Line
Cometic MLS Marine Head Gaskets
Product Attributes - UPC
00191070136109
Product Attributes - Bore (in.)
4.530 in.
Product Attributes - Bore (mm)
115.060mm
Product Attributes - Gasket Material
Multi-layer stainless steel
Product Attributes - Compressed Thickness (in.)
0.080 in.
Product Attributes - Compressed Volume (cc)
21.129cc
Product Attributes - Lock Wire
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Designed to fit Mercury marine 1050 Gen IV with 2-bolt intake side of gasket applications.

Reference Information

Brand Name/s Cometic Gasket
StreetFX SKU cgsC5639-080
SFX Item ID 4169736
Supplier Item Code 4169736
Manufacturer SKU C5639-080
Manufacturer UPC 191070136109
Alternative References CGT-C5639-080, .080in, Gasket-4.530in

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1965
    Ending Year1970
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size6.5L/396
  • MakeCHEVROLET
    Beginning Year1966
    Ending Year1969
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.0L/427
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1972
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size6.6L/402
  • MakeCHEVROLET
    Beginning Year1970
    Ending Year1990
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454

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