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Cometic GM/Mercury Marine 1050 Gen-IV Big Block V8 .040in MLS Cylinder Head Gasket-4.530in Bore

SKU: CGSC5639-040

Head Gaskets

CG Head Gaskets...

Cometic GM/Mercury Marine 1050 Gen-IV Big Block V8 .040in MLS Cylinder Head Gasket-4.530in Bore

SKU: CGSC5639-040

Head Gaskets

CG Head Gaskets...

A$398.17
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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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

Cometic Head Gaskets are developed with the performance enthusiast in mind. With so many individual requirements for each motor Cometic offers a number of options to suit your specific motor and needs. *MLS* The Cometic MLS gasket is comprised of three layers of Stainless Steel. Cometic uses Stainless steel for increased strength, it’s ability to rebound and corrosion resistance. The outer layers of the gasket are embossed and coated on both sides with a flouroelastomer rubber based material (Viton) designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes. The Viton coating is heat resistant to 2500C or 4820F. The center or shim layer of the gasket is comprised of an uncoated Stainless Steel layer, which can be varied to accommodate multiple thickness requirements. The MLS gasket is ideal for both aluminum heads to cast iron blocks and aluminum heads to aluminum blocks. The composition of MLS will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is necessary. By design the MLS gasket promotes an even torque load across the sealing surface allowing for measurable reduced bore distortion. *CFM-20* A perforated steel core with an elastomer surface is ideal for head gaskets allowing heat to be drawn evenly across the gasket surface while providing maximum sealing characteristics when exposed to coolants and oils. *COPPER*


Features and Benefits

  • Embossed Outer Layers Coated w/Viton

Product Details

Bore Diameter:4.530in
Cylinder Head Configuration:2 Slotted Valley Bolts
Description:GM/Mercury Marine Gen-IV Cylinder Head Gasket
Engine Make/Size:GM/Mercury Marine Gen IV Big Block
Engine:GM/Mercury Marine Gen IV Big Block V8
Part Number:cgsC5639-040
Position:N/A
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
Thickness:.040in
Title:Cometic Gasket Automotive GM/Mercury Marine 1050 Gen-IV Big Block V8 .040 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 00:06:15

Features

  • Conforms load distribution across the sealing area
  • Embossed Outer Layers Coated w/Viton
  • 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
C5639-040
Product Attributes - Part Type
Head Gaskets
Product Attributes - Product Line
Cometic MLS Marine Head Gaskets
Product Attributes - UPC
191070029432
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.)
0.040 in.
Product Attributes - Compressed Volume (cc)
10.564cc
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 cgsC5639-040
SFX Item ID 4169728
Supplier Item Code 4169728
Manufacturer SKU C5639-040
Manufacturer UPC 191070029432
Alternative References CAGC5639-040, CGT-C5639-040, .040in, 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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