Cometic Gasket Chevy Small Block 4.165in Bore .040in MLS Head Gasket

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SKU: CGSC5248-040

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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

Product Details

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Sizing & Fit

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

High-Performance Cometic MLS Head Gasket for Chevy Small Block

Achieve a superior seal in your high-output engine with the Cometic Multi-Layer Steel (MLS) Head Gasket. Specifically engineered for Chevy Small Block applications with a 4.165-inch bore, this .040-inch compressed thickness gasket features integrated steam holes to ensure optimal cooling and engine longevity. Built to handle the extreme cylinder pressures of performance builds, this gasket is the gold standard for reliability.

Why Choose Cometic MLS Gaskets?

  • Multi-Layer Steel Design: Comprised of multiple layers of stainless steel, providing increased strength and the ability to rebound under thermal expansion.
  • Viton Coating: The outer layers are embossed and coated with Viton, a high-temperature fluoroelastomer rubber that ensures a leak-free seal against rough surface finishes.
  • No Sealant Required: Designed for a direct install, these gaskets maintain a perfect seal without the need for additional sprays or sealants.
  • Versatile Compatibility: Ideal for both aluminum-to-aluminum and aluminum-to-cast-iron engine combinations, effectively managing shearing forces.

Whether you are running a street-strip machine or a dedicated track car, this gasket provides the resilience needed to prevent blowouts and maintain compression. It is the perfect choice for 1980-era Chevy, GMC, and Oldsmobile V8 platforms requiring precise fitment. Experience the professional difference with premium engine components from GGCRACING.

…and 199 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

High-Performance Cometic MLS Head Gasket for Chevy Small Block

Achieve a superior seal in your high-output engine with the Cometic Multi-Layer Steel (MLS) Head Gasket. Specifically engineered for Chevy Small Block applications with a 4.165-inch bore, this .040-inch compressed thickness gasket features integrated steam holes to ensure optimal cooling and engine longevity. Built to handle the extreme cylinder pressures of performance builds, this gasket is the gold standard for reliability.

Why Choose Cometic MLS Gaskets?

  • Multi-Layer Steel Design: Comprised of multiple layers of stainless steel, providing increased strength and the ability to rebound under thermal expansion.
  • Viton Coating: The outer layers are embossed and coated with Viton, a high-temperature fluoroelastomer rubber that ensures a leak-free seal against rough surface finishes.
  • No Sealant Required: Designed for a direct install, these gaskets maintain a perfect seal without the need for additional sprays or sealants.
  • Versatile Compatibility: Ideal for both aluminum-to-aluminum and aluminum-to-cast-iron engine combinations, effectively managing shearing forces.

Whether you are running a street-strip machine or a dedicated track car, this gasket provides the resilience needed to prevent blowouts and maintain compression. It is the perfect choice for 1980-era Chevy, GMC, and Oldsmobile V8 platforms requiring precise fitment. Experience the professional difference with premium engine components from GGCRACING.

…and 199 additional fitments. Contact us to confirm yours.

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