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Cometic Gasket

Cometic GM LS1 SB 4.100in Bore .045in MLS-5 Head Gasket

MPN: c5489-045 Catalog #: 001272823 Category: Head Gaskets Check Vehicle Fitment

Product Details

GM LS1/LS2/LS3/LS6 Gen-3/4 Small Block V8 .045in. MLS Cylinder Head Gasket, 4.100in. Bore

The embossed outer layers of the gaskets meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes

Comprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0.045. 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.

COMETIC MLS (Multi-Layer Steel) Head Gaskets provide maximum sealing performance for today's 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 flouroelastomer 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.

GM Gen III/IV Small Block V8 LS Series MLS Head Gasket 4.100in. Bore.Comprised of mulitple embossed layers of stainless steel with the outer layers utilizing a viton rubber coating.Compressed operating thickness is .045in. Each

GM Gen III/IV Small Block V8 LS Series MLS Head Gasket 4.100 Bore.Comprised of mulitple embossed layers of stainless steel with the outer layers utilizing a viton rubber coating.Compressed operating thickness is .045. Each

Cometic GM LS1 SB 4.100in Bore .045in Thick MLS-5 Head Gasket

.045in. MLS Cylinder Head Gasket; 4.100in. Gasket Bore. Each

.045 MLS Cylinder Head Gasket, 4.100 Gasket Bore. Each

Engine Cylinder Head Gasket

Cylinder Head Gasket

Vehicle Fitment

Universal or product-specific fitment. Please review the product details and contact us if you need help confirming fitment before ordering.

Engine Compatibility

GM - LSMatched variant: LS

GM Gen III/IV V8; LS1/LS2/LS3/LS6/LS7/LS9/LSA/LSX

Fitment note: Engine compatibility is provided as a guide. Please verify all fitment details before ordering.

Product Specs

Brand
Cometic Gasket
Part Number
c5489-045
Catalog Number
001272823
Product Line
CG Head Gaskets
Category
Engines & Parts
Type
Head Gaskets
UPC / Barcode
191070012472
Vendor Product Category
Engine Components
Vendor Product Subcategory
Head Gaskets
Length
24.00 in
Width
9.50 in
Height
0.50 in
Weight
1.10 lb
Units Per SKU
1
Freight / LTL
No
Air Restricted
No
Prop 65
Y
CARB Approved
Yes
Clearance Item
No

Shipping & Availability

Current status 1 Available - Ready to ship
Estimated timing Usually ships within 24hrs

This item is showing available inventory. Most in-stock performance parts ship quickly, but timing can vary by warehouse, vendor cut-off time, holidays, and carrier pickup.

PROP 65 WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Inventory shown: 1 available as of 6/3/2026.

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