Street. Track. Everything between.
Your garage Find parts for your vehicle Select year, make and model to narrow your search.

Cometic Chevy BB Gen IV 396/402/427/454 H/G 4.320 inch Bore .051 inch MLS Head Gasket

SKU: CGSC5816-051

Head Gaskets

CG Head Gaskets...

Cometic Chevy BB Gen IV 396/402/427/454 H/G 4.320 inch Bore .051 inch MLS Head Gasket

SKU: CGSC5816-051

Head Gaskets

CG Head Gaskets...

A$240.37
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.
View cart
We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

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:4.320in
Description:.051in. MLS Cylinder Head Gasket; 4.320in. Gasket Bore. Each
Engine Block Configuration:Lower 3 Open
Engine Make/Size:GM Gen II/ Mark IV Big Block V8
Engine:GM Gen II/ Mark IV Big Block V8
Part Number:cgsC5816-051
Position:Left or Right
Prop 65 (C, R or CR):CR
Prop 65 - Short Label:Prop_65.jpg
Prop 65 Yes/No:Yes
Thickness:.051in
Title:Cometic Gaskets .051in. MLS Cylinder Head Gasket; 4.320in. Gasket Bore. Each
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 02:07:15

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
C5816-051
Product Attributes - Part Type
Head Gaskets
Product Attributes - Product Line
Cometic MLS Head Gaskets
Product Attributes - UPC
191070017309
Product Attributes - Bore (in.)
4.320 in.
Product Attributes - Bore (mm)
109.728mm
Product Attributes - Gasket Material
Multi-layer stainless steel
Product Attributes - Compressed Thickness (in.)
0.051 in.
Product Attributes - Compressed Volume (cc)
12.250cc
Product Attributes - Lock Wire
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Will fit GM Bowtie blocks also. Features two water holes on each end, lower three open.

Reference Information

Brand Name/s Cometic Gasket
StreetFX SKU cgsC5816-051
SFX Item ID 4161655
Supplier Item Code 4161655
Manufacturer SKU C5816-051
Manufacturer UPC 191070017309
Alternative References CAGC5816-051, CGT-C5816-051

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

Loading compatibility information...

Keep shopping

More from Cometic Gasket