What is the compressed thickness of this head gasket?

This Cometic head gasket has a compressed operating thickness of 0.045 inches. This measurement is critical for ensuring proper cylinder head seating and compression ratios.

Do I need to use any sealant with this gasket?

No, Cometic MLS head gaskets are designed to provide maximum sealing performance without the need for additional sealants. The Viton coating on the outer layers ensures a reliable seal.

What is the bore size of this gasket?

The bore size for this specific Cometic head gasket is 4.280 inches. This is important to match with the bore of your engine's cylinders for optimal performance.

Specifications

Brand: Cometic Gasket
Part #: C5764-045
UPC: 191070139599

Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .045in MLS Cylinder Head Gasket - 4.280in Bore - LHS

Name: Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .045in MLS Cylinder Head Gasket - 4.280in Bore - LHS
Brand: Cometic Gasket
SKU: cometic-gasket-cometic-gm-l18-vortec-8100-gen-vii-big-block-v8-045in-mls-cylinde-t14-803616
Price: 114.06 USD
Availability: BackOrder

$114.06

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Cometic GM L18 Vortec 8100 Gen-VII Big Block V8 .045in MLS head gasket. Fits a range of Chevy/GMC trucks and SUVs.

Key Features

Fits 2001-2007 Chevrolet and GMC trucks and SUVs with the GM L18 Vortec 8100 Gen-VII Big Block V8 engine.
Multi-Layer Steel (MLS) construction offers increased strength and corrosion resistance.
Outer layers are embossed and coated with heat-resistant Viton rubber.
Compressed operating thickness is 0.045 inches.
Bore size is 4.280 inches.
Designed for use with aluminum heads to aluminum blocks or aluminum heads to cast iron blocks.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're working on the top end of a GM L18 Vortec 8100 Gen-VII Big Block V8, this Cometic Multi-Layer Steel (MLS) cylinder head gasket is what you need for the left side. It's built with multiple layers of stainless steel, which gives it strength and helps it resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle tough sealing jobs and different surface finishes, meaning you don't need to add any extra sealants.

This gasket has a compressed thickness of 0.045 inches and a bore size of 4.280 inches, designed to work with both aluminum and cast iron blocks. The multiple stainless steel layers are embossed and can rebound, helping to maintain a strong seal even under high output conditions. This makes it a solid choice for rebuilding or repairing engines in a variety of Chevrolet and GMC trucks and SUVs, like the Silverado, Sierra, Avalanche, and Yukon XL.