Cometic Chevy SB 4.200" Bore .051" MLS Head Gasket (All Steam Holes) — Fits Small Block Chevy

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SKU: CGSC5249-051
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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

Product Description
Part Numbers
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.

Cometic Multi-Layer Steel (MLS) Head Gasket for Chevy Small Block (4.200" Bore)

Achieve superior sealing performance for your high-performance Chevrolet Small Block engine using this Cometic Multi-Layer Steel (MLS) Head Gasket. Specifically designed for a 4.200-inch bore and featuring a compressed operating thickness of 0.051 inches, this gasket is built to handle the demands of powerful engines.

Advanced Sealing Technology:

  • Multi-Layer Steel (MLS) Construction: Composed of multiple embossed stainless steel layers, providing exceptional strength, resilience, and resistance to extreme cylinder pressures.
  • Viton Elastomer Coating: The outer layers are coated with Viton, a high-temperature resistant rubber, ensuring a durable and reliable seal against combustion gases and fluids.
  • Complete Steam Hole Design: This gasket includes all necessary steam holes, vital for effective coolant flow and maintaining stable engine temperatures.
  • Broad Application Fitment: Suitable for a wide array of Chevrolet, GMC, and Buick vehicles utilizing a 4.165" bore, including many classic V8 applications.
  • Easy Installation: Cometic MLS head gaskets are engineered for direct fitment and do not require additional sealants, streamlining the installation process.
  • Corrosion Resistance: The robust stainless steel construction offers excellent protection against corrosion, ensuring longevity and consistent performance.

For builders and enthusiasts seeking the ultimate in head gasket technology for their Chevrolet Small Block builds, this Cometic MLS gasket delivers unmatched reliability and performance. Trust GGCRACING for your performance engine needs.

Part Number: CGSC5249-051

Discover top-tier engine components at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1980-1985 Avanti II Base
1985 Avanti II GT
1980 Buick Century Estate
1980-1981 Buick Century Base
1980-1981 Buick Century Limited
1982 Buick LeSabre Custom
1982 Buick LeSabre Limited
1980-1981 Buick Regal Limited
1980-1981 Buick Regal Base
1986 Buick Regal Limited
1986 Buick Regal Base
1980-1982 Checker Marathon Base
1980-1982 Checker Marathon Deluxe
1980 Chevrolet C10 Big Ten
1980 Chevrolet C10 Custom Deluxe
1980-1981 Chevrolet C10 Cheyenne
1980-1986 Chevrolet C10 Scottsdale
1980-1986 Chevrolet C10 Silverado
1981 Chevrolet C10 Deluxe
1981-1986 Chevrolet C10 Custom
1980 Chevrolet C10 Suburban Scottsdale
1980 Chevrolet C10 Suburban Silverado
1980 Chevrolet C10 Suburban Custom Deluxe
1981 Chevrolet C10 Suburban Deluxe
1981-1986 Chevrolet C10 Suburban Custom
1982 Chevrolet C10 Suburban Scottsdale
1982-1986 Chevrolet C10 Suburban Silverado
1984-1986 Chevrolet C10 Suburban Scottsdale
1980 Chevrolet C20 Custom Deluxe
1980-1981 Chevrolet C20 Cheyenne
1980-1986 Chevrolet C20 Scottsdale
1980-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1980 Chevrolet C20 Suburban Custom Deluxe
1980 Chevrolet C20 Suburban Scottsdale
1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1980 Chevrolet C30 Custom Deluxe
1980-1981 Chevrolet C30 Cheyenne
1980-1986 Chevrolet C30 Scottsdale
1980-1986 Chevrolet C30 Silverado
1981 Chevrolet C30 Deluxe
1981-1986 Chevrolet C30 Custom
1980 Chevrolet Camaro Base
1980 Chevrolet Camaro Rally Sport
1980-1986 Chevrolet Camaro Berlinetta
1980-1986 Chevrolet Camaro Z28
1981-1986 Chevrolet Camaro Sport
1982 Chevrolet Camaro Z28 Indianapolis 500 Pace Car
1985-1986 Chevrolet Camaro Iroc-Z
1980 Chevrolet Caprice Classic Sport
1980-1981 Chevrolet Caprice Classic Landau
1980-1986 Chevrolet Caprice Classic
1981-1982 Chevrolet Caprice Classic Estate
1986 Chevrolet Caprice Base

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

Product Details

Product Description
Part Numbers
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.

Cometic Multi-Layer Steel (MLS) Head Gasket for Chevy Small Block (4.200" Bore)

Achieve superior sealing performance for your high-performance Chevrolet Small Block engine using this Cometic Multi-Layer Steel (MLS) Head Gasket. Specifically designed for a 4.200-inch bore and featuring a compressed operating thickness of 0.051 inches, this gasket is built to handle the demands of powerful engines.

Advanced Sealing Technology:

  • Multi-Layer Steel (MLS) Construction: Composed of multiple embossed stainless steel layers, providing exceptional strength, resilience, and resistance to extreme cylinder pressures.
  • Viton Elastomer Coating: The outer layers are coated with Viton, a high-temperature resistant rubber, ensuring a durable and reliable seal against combustion gases and fluids.
  • Complete Steam Hole Design: This gasket includes all necessary steam holes, vital for effective coolant flow and maintaining stable engine temperatures.
  • Broad Application Fitment: Suitable for a wide array of Chevrolet, GMC, and Buick vehicles utilizing a 4.165" bore, including many classic V8 applications.
  • Easy Installation: Cometic MLS head gaskets are engineered for direct fitment and do not require additional sealants, streamlining the installation process.
  • Corrosion Resistance: The robust stainless steel construction offers excellent protection against corrosion, ensuring longevity and consistent performance.

For builders and enthusiasts seeking the ultimate in head gasket technology for their Chevrolet Small Block builds, this Cometic MLS gasket delivers unmatched reliability and performance. Trust GGCRACING for your performance engine needs.

Part Number: CGSC5249-051

Discover top-tier engine components at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1980-1985 Avanti II Base
1985 Avanti II GT
1980 Buick Century Estate
1980-1981 Buick Century Base
1980-1981 Buick Century Limited
1982 Buick LeSabre Custom
1982 Buick LeSabre Limited
1980-1981 Buick Regal Limited
1980-1981 Buick Regal Base
1986 Buick Regal Limited
1986 Buick Regal Base
1980-1982 Checker Marathon Base
1980-1982 Checker Marathon Deluxe
1980 Chevrolet C10 Big Ten
1980 Chevrolet C10 Custom Deluxe
1980-1981 Chevrolet C10 Cheyenne
1980-1986 Chevrolet C10 Scottsdale
1980-1986 Chevrolet C10 Silverado
1981 Chevrolet C10 Deluxe
1981-1986 Chevrolet C10 Custom
1980 Chevrolet C10 Suburban Scottsdale
1980 Chevrolet C10 Suburban Silverado
1980 Chevrolet C10 Suburban Custom Deluxe
1981 Chevrolet C10 Suburban Deluxe
1981-1986 Chevrolet C10 Suburban Custom
1982 Chevrolet C10 Suburban Scottsdale
1982-1986 Chevrolet C10 Suburban Silverado
1984-1986 Chevrolet C10 Suburban Scottsdale
1980 Chevrolet C20 Custom Deluxe
1980-1981 Chevrolet C20 Cheyenne
1980-1986 Chevrolet C20 Scottsdale
1980-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1980 Chevrolet C20 Suburban Custom Deluxe
1980 Chevrolet C20 Suburban Scottsdale
1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1980 Chevrolet C30 Custom Deluxe
1980-1981 Chevrolet C30 Cheyenne
1980-1986 Chevrolet C30 Scottsdale
1980-1986 Chevrolet C30 Silverado
1981 Chevrolet C30 Deluxe
1981-1986 Chevrolet C30 Custom
1980 Chevrolet Camaro Base
1980 Chevrolet Camaro Rally Sport
1980-1986 Chevrolet Camaro Berlinetta
1980-1986 Chevrolet Camaro Z28
1981-1986 Chevrolet Camaro Sport
1982 Chevrolet Camaro Z28 Indianapolis 500 Pace Car
1985-1986 Chevrolet Camaro Iroc-Z
1980 Chevrolet Caprice Classic Sport
1980-1981 Chevrolet Caprice Classic Landau
1980-1986 Chevrolet Caprice Classic
1981-1982 Chevrolet Caprice Classic Estate
1986 Chevrolet Caprice Base

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

Product Details

Product Description

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.

Cometic Multi-Layer Steel (MLS) Head Gasket for Chevy Small Block (4.200" Bore)

Achieve superior sealing performance for your high-performance Chevrolet Small Block engine using this Cometic Multi-Layer Steel (MLS) Head Gasket. Specifically designed for a 4.200-inch bore and featuring a compressed operating thickness of 0.051 inches, this gasket is built to handle the demands of powerful engines.

Advanced Sealing Technology:

  • Multi-Layer Steel (MLS) Construction: Composed of multiple embossed stainless steel layers, providing exceptional strength, resilience, and resistance to extreme cylinder pressures.
  • Viton Elastomer Coating: The outer layers are coated with Viton, a high-temperature resistant rubber, ensuring a durable and reliable seal against combustion gases and fluids.
  • Complete Steam Hole Design: This gasket includes all necessary steam holes, vital for effective coolant flow and maintaining stable engine temperatures.
  • Broad Application Fitment: Suitable for a wide array of Chevrolet, GMC, and Buick vehicles utilizing a 4.165" bore, including many classic V8 applications.
  • Easy Installation: Cometic MLS head gaskets are engineered for direct fitment and do not require additional sealants, streamlining the installation process.
  • Corrosion Resistance: The robust stainless steel construction offers excellent protection against corrosion, ensuring longevity and consistent performance.

For builders and enthusiasts seeking the ultimate in head gasket technology for their Chevrolet Small Block builds, this Cometic MLS gasket delivers unmatched reliability and performance. Trust GGCRACING for your performance engine needs.

Part Number: CGSC5249-051

Discover top-tier engine components at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1980-1985 Avanti II Base
1985 Avanti II GT
1980 Buick Century Estate
1980-1981 Buick Century Base
1980-1981 Buick Century Limited
1982 Buick LeSabre Custom
1982 Buick LeSabre Limited
1980-1981 Buick Regal Limited
1980-1981 Buick Regal Base
1986 Buick Regal Limited
1986 Buick Regal Base
1980-1982 Checker Marathon Base
1980-1982 Checker Marathon Deluxe
1980 Chevrolet C10 Big Ten
1980 Chevrolet C10 Custom Deluxe
1980-1981 Chevrolet C10 Cheyenne
1980-1986 Chevrolet C10 Scottsdale
1980-1986 Chevrolet C10 Silverado
1981 Chevrolet C10 Deluxe
1981-1986 Chevrolet C10 Custom
1980 Chevrolet C10 Suburban Scottsdale
1980 Chevrolet C10 Suburban Silverado
1980 Chevrolet C10 Suburban Custom Deluxe
1981 Chevrolet C10 Suburban Deluxe
1981-1986 Chevrolet C10 Suburban Custom
1982 Chevrolet C10 Suburban Scottsdale
1982-1986 Chevrolet C10 Suburban Silverado
1984-1986 Chevrolet C10 Suburban Scottsdale
1980 Chevrolet C20 Custom Deluxe
1980-1981 Chevrolet C20 Cheyenne
1980-1986 Chevrolet C20 Scottsdale
1980-1986 Chevrolet C20 Silverado
1981 Chevrolet C20 Deluxe
1981-1986 Chevrolet C20 Custom
1980 Chevrolet C20 Suburban Custom Deluxe
1980 Chevrolet C20 Suburban Scottsdale
1980 Chevrolet C20 Suburban Silverado
1981 Chevrolet C20 Suburban Deluxe
1981-1986 Chevrolet C20 Suburban Custom
1982 Chevrolet C20 Suburban Scottsdale
1982-1986 Chevrolet C20 Suburban Silverado
1984-1986 Chevrolet C20 Suburban Scottsdale
1980 Chevrolet C30 Custom Deluxe
1980-1981 Chevrolet C30 Cheyenne
1980-1986 Chevrolet C30 Scottsdale
1980-1986 Chevrolet C30 Silverado
1981 Chevrolet C30 Deluxe
1981-1986 Chevrolet C30 Custom
1980 Chevrolet Camaro Base
1980 Chevrolet Camaro Rally Sport
1980-1986 Chevrolet Camaro Berlinetta
1980-1986 Chevrolet Camaro Z28
1981-1986 Chevrolet Camaro Sport
1982 Chevrolet Camaro Z28 Indianapolis 500 Pace Car
1985-1986 Chevrolet Camaro Iroc-Z
1980 Chevrolet Caprice Classic Sport
1980-1981 Chevrolet Caprice Classic Landau
1980-1986 Chevrolet Caprice Classic
1981-1982 Chevrolet Caprice Classic Estate
1986 Chevrolet Caprice Base

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

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