Cometic Gasket
Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines
Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines
Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines
Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines
Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines
Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines
Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines
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Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS EnginesCometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS EnginesCometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS EnginesCometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS EnginesCometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS EnginesCometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS EnginesCometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines
Cometic Gasket

Cometic GM LS1 3.910in Bore .040in MLS Head Gasket — Fits 1997-2002 GM LS Engines

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SKU: CGSC5475-040

About Cometic Gasket Cometic Gasket is the world leader in ...Read more

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

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About Cometic Gasket

Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.

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Maximum Sealing for High-Output GM LS Engines

When building a high-performance GM LS1 engine, the integrity of your cylinder head seal is paramount. The Cometic GM LS1 3.910 inch Bore .040 inch MLS Head Gasket is engineered to provide a superior seal that withstands the extreme pressures and temperatures of modern performance builds. By utilizing a multi-layer stainless steel (MLS) design, this gasket offers exceptional strength, rebound, and corrosion resistance.

Advanced MLS Technology

The gasket features outer layers embossed and coated on both sides with Viton, a high-temperature fluoroelastomer rubber. This specialized coating is heat resistant up to 250°C (482°F), ensuring a reliable seal even under harsh operating conditions. Whether you are running aluminum heads on an aluminum block or a mixed-material setup, this gasket is designed to handle the shearing forces created by thermal expansion.

  • Bore Size: 3.910 inches
  • Compressed Thickness: .040 inches
  • Construction: Multi-Layer Stainless Steel with Viton coating
  • Compatibility: Ideal for GM LS1 engines
  • Installation: No additional sealants required

This gasket is the gold standard for enthusiasts who demand reliability without sacrificing performance. Its robust construction ensures that your combustion chamber remains sealed under boost, nitrous, or high-compression naturally aspirated setups. Experience the precision engineering of Cometic gaskets, available now through GGCRACING.

…and 67 additional fitments. Contact us to confirm yours.

About Cometic Gasket

Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.

Watch in action

Maximum Sealing for High-Output GM LS Engines

When building a high-performance GM LS1 engine, the integrity of your cylinder head seal is paramount. The Cometic GM LS1 3.910 inch Bore .040 inch MLS Head Gasket is engineered to provide a superior seal that withstands the extreme pressures and temperatures of modern performance builds. By utilizing a multi-layer stainless steel (MLS) design, this gasket offers exceptional strength, rebound, and corrosion resistance.

Advanced MLS Technology

The gasket features outer layers embossed and coated on both sides with Viton, a high-temperature fluoroelastomer rubber. This specialized coating is heat resistant up to 250°C (482°F), ensuring a reliable seal even under harsh operating conditions. Whether you are running aluminum heads on an aluminum block or a mixed-material setup, this gasket is designed to handle the shearing forces created by thermal expansion.

  • Bore Size: 3.910 inches
  • Compressed Thickness: .040 inches
  • Construction: Multi-Layer Stainless Steel with Viton coating
  • Compatibility: Ideal for GM LS1 engines
  • Installation: No additional sealants required

This gasket is the gold standard for enthusiasts who demand reliability without sacrificing performance. Its robust construction ensures that your combustion chamber remains sealed under boost, nitrous, or high-compression naturally aspirated setups. Experience the precision engineering of Cometic gaskets, available now through GGCRACING.

…and 67 additional fitments. Contact us to confirm yours.

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