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Cometic 09+ GM LS9 4.100in Bore .051 thick MLS RHS Head Gasket

SKU: CGSC5985-051

Head Gaskets

CG Head Gaskets...

Cometic 09+ GM LS9 4.100in Bore .051 thick MLS RHS Head Gasket

SKU: CGSC5985-051

Head Gaskets

CG Head Gaskets...

A$442.11
IN STOCK! Est Ship 4-7 days. In stock at 1 location (4 available)

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Description

Exclusive Cometic Gasket flash sale discount at StreetFX!

Talk about timing! This is a limited offer while stocks last on various Cometic Gasket part numbers. There's never been a better time to buy your Cometic Gasket upgrades, so what are you waiting for?!

This item is currently on sale!

Same-day payment required to secure promotional price. Promotions may end early or be extended based on stock levels or other factors.

Cylinder Head Gasket - 4.100 in Bore - 0.051 in Compression Thickness - Multi-Layer Steel - Small LS-Series - Each

Additional Information

LS9 Applications only

Cylinder Head Gasket

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

Additional Information

GM LS9/LSA Gen-4 Small Block V8 .051in. MLX Cylinder Head Gasket; 4.100in. Bore; RHS

Part Type

Engine Cylinder Head Gasket

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*

Additional Application Notes
• 0.051 in. Multi-Layer Stainless Steel; 4.100 in. Bore; Right Hand Side
• 0.051 in. MLX; 4.100 in. Bore; Right Hand Side
• Orientation: Right Material: MLX Compressed Thickness: .051 Bore Size (IN): 4.100 Bore Shape: Round # of layers: 5

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

Data: v4.2 - Upd: 2026-11-09 03:13:20

Features

  • Conforms load distribution across the sealing area
  • Requires less clamp load creating less bore distortion
  • Requires No Sealants Or Re-Torque
  • 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

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Bore Diameter:4.100in
Description:GM LS9/LSA Gen-4 Small Block V8 Cylinder Head Gasket
Engine Make/Size:GM Gen IV Small Block LS9
Engine:GM Gen IV Small Block V8
Part Number:cgsC5985-051
Position:Right
Thickness:.051in
Title:Cometic Gasket Automotive GM LS9/LSA Gen-4 Small Block V8 .051 in MLX Cylinder Head Gasket, 4.100 in Bore, RHS

Product Downloads

# Document Type Download
1. Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-07 18:36:10

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Cometic Gasket, Cometic, Cometic Gasket Automotive, Cometic Gasket Marine, Cometic Gasket Powersports, COMETIC GASKETS, Cometic Powersport Gaskets
StreetFX SKU cgsC5985-051
SFX Item ID 4159403
Accounting SKU cgs-C5985-051
Manufacturer SKU C5985-051
Manufacturer UPC 191070029494
Alternative References C5985-051, CAGC5985-051, CGT-C5985-051

Head Gasket, MLX, 4.100 in. Bore, .051 in. Compressed Thickness, Chevy, 6.2L, Each

The leak stops here! Cometic MLX head gaskets feature a unique integrated "stopper" layer for optimum combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion. The MLX head gaskets, like their MLS counterparts, are multi-layer stainless steel for increased strength—and require no sealants or re-torquing. Dozens of models are available; order the MLX head gaskets designed to maximize your engine's power and performance.

Product Attributes
BrandCometic
Manufacturer's Part NumberC5985-051
Part TypeHead Gaskets
Product LineCometic MLX Head Gaskets
UPC191070029494
Bore (in.)4.100 in.
Bore (mm)104.140mm
Gasket MaterialMulti-layer stainless steel
Compressed Thickness (in.)0.051 in.
Compressed Volume (cc)11.034cc
Lock WireNo
QuantitySold individually.
NotesPassenger side head gasket for use with LS9 applications only.

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