Cometic HD Evo Stock Bore Head Gasket - .040in — 3.500in Bore (2-Pack)

SKU: CGSC9689
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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 High-Performance Head Gaskets for Harley-Davidson Evo Engines

Ensure a perfect seal and maximize the performance of your Harley-Davidson Evolution (Evo) engine with Cometic's Heavy Duty Stock Bore Head Gaskets. These gaskets are precision-engineered for 3.500-inch bore applications and a thickness of .040 inches, providing a reliable solution for high-performance V-Twin engines.

Engineered for Extreme Conditions

Modern V-Twin engines produce significant horsepower and higher cylinder pressures. Cometic gaskets are designed to meet these demands:

  • Superior Sealing: Made from premium materials, these gaskets provide an exceptional seal under high temperatures and pressures, preventing leaks and blowouts.
  • Optimized Bore Size: Specifically designed for a 3.500-inch bore, ensuring a precise fit for stock bore Evo engines.
  • Correct Thickness: The .040-inch thickness is ideal for maintaining proper compression ratios in many performance applications.
  • Durable Construction: Built to withstand the rigors of performance riding, ensuring long-lasting reliability.

Application and Benefits

These Cometic head gaskets are suitable for a wide range of Harley-Davidson models equipped with the Evolution engine, from the mid-80s through the late 90s. They are essential for engine rebuilds, performance upgrades, or routine maintenance where a reliable seal is critical.

Key Features:

  • Heavy Duty construction for demanding applications
  • Designed for Harley-Davidson Evolution (Evo) engines
  • Stock bore size: 3.500 inches
  • Thickness: .040 inches
  • Provides a reliable and durable seal
  • Sold as a 2-pack

Trust Cometic Gasket for your V-Twin engine needs. Get your HD Evo Stock Bore Head Gaskets at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1997-1999 Harley-Davidson FLHR Road King Base
1998-1999 Harley-Davidson FLHRCI Road King Classic Base
1996-1997 Harley-Davidson FLHRI Road King Base
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1993 Harley-Davidson FLHS Electra Glide Sport Base
1984-1999 Harley-Davidson FLHTC Electra Glide Classic Base
1996-1999 Harley-Davidson FLHTCI Electra Glide Classic Base
1989-1997 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1986-1990 Harley-Davidson FLST Heritage Softail Base
1988-1999 Harley-Davidson FLSTC Heritage Softail Classic Base
1990-1999 Harley-Davidson FLSTF Fat Boy Base
1994-1996 Harley-Davidson FLSTN Heritage Softail Special Base
1998-1999 Harley-Davidson FLTR Road Glide Base
1998-1999 Harley-Davidson FLTRI Road Glide Base
1995-1999 Harley-Davidson FXD Dyna Super Glide Base
1993-1999 Harley-Davidson FXDL Dyna Low Rider Base
1993-1999 Harley-Davidson FXDWG Dyna Wide Glide Base
1999 Harley-Davidson FXDX Dyna Super Glide Sport Base
1999 Harley-Davidson FXR2 Base
1999 Harley-Davidson FXR3 Base
1984-1992 Harley-Davidson FXRS Low Glide Base
1984-1992 Harley-Davidson FXRT Sport Glide Base
1984-1999 Harley-Davidson FXST Softail Standard Base
1999 Harley-Davidson FXSTB Night Train Base
1986-1999 Harley-Davidson FXSTC Softail Custom Base
1988-1999 Harley-Davidson FXSTS Springer Softail Base
1995-1997 Harley-Davidson FXSTSB Bad Boy Base
2016-2020 Harley-Davidson XL1200CX Roadster Base
2012-2016 Harley-Davidson XL1200V Seventy-Two Base
2010-2020 Harley-Davidson XL1200X Forty-Eight Base
1988-2003 Harley-Davidson XLH1200 Base

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 High-Performance Head Gaskets for Harley-Davidson Evo Engines

Ensure a perfect seal and maximize the performance of your Harley-Davidson Evolution (Evo) engine with Cometic's Heavy Duty Stock Bore Head Gaskets. These gaskets are precision-engineered for 3.500-inch bore applications and a thickness of .040 inches, providing a reliable solution for high-performance V-Twin engines.

Engineered for Extreme Conditions

Modern V-Twin engines produce significant horsepower and higher cylinder pressures. Cometic gaskets are designed to meet these demands:

  • Superior Sealing: Made from premium materials, these gaskets provide an exceptional seal under high temperatures and pressures, preventing leaks and blowouts.
  • Optimized Bore Size: Specifically designed for a 3.500-inch bore, ensuring a precise fit for stock bore Evo engines.
  • Correct Thickness: The .040-inch thickness is ideal for maintaining proper compression ratios in many performance applications.
  • Durable Construction: Built to withstand the rigors of performance riding, ensuring long-lasting reliability.

Application and Benefits

These Cometic head gaskets are suitable for a wide range of Harley-Davidson models equipped with the Evolution engine, from the mid-80s through the late 90s. They are essential for engine rebuilds, performance upgrades, or routine maintenance where a reliable seal is critical.

Key Features:

  • Heavy Duty construction for demanding applications
  • Designed for Harley-Davidson Evolution (Evo) engines
  • Stock bore size: 3.500 inches
  • Thickness: .040 inches
  • Provides a reliable and durable seal
  • Sold as a 2-pack

Trust Cometic Gasket for your V-Twin engine needs. Get your HD Evo Stock Bore Head Gaskets at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1997-1999 Harley-Davidson FLHR Road King Base
1998-1999 Harley-Davidson FLHRCI Road King Classic Base
1996-1997 Harley-Davidson FLHRI Road King Base
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1993 Harley-Davidson FLHS Electra Glide Sport Base
1984-1999 Harley-Davidson FLHTC Electra Glide Classic Base
1996-1999 Harley-Davidson FLHTCI Electra Glide Classic Base
1989-1997 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1986-1990 Harley-Davidson FLST Heritage Softail Base
1988-1999 Harley-Davidson FLSTC Heritage Softail Classic Base
1990-1999 Harley-Davidson FLSTF Fat Boy Base
1994-1996 Harley-Davidson FLSTN Heritage Softail Special Base
1998-1999 Harley-Davidson FLTR Road Glide Base
1998-1999 Harley-Davidson FLTRI Road Glide Base
1995-1999 Harley-Davidson FXD Dyna Super Glide Base
1993-1999 Harley-Davidson FXDL Dyna Low Rider Base
1993-1999 Harley-Davidson FXDWG Dyna Wide Glide Base
1999 Harley-Davidson FXDX Dyna Super Glide Sport Base
1999 Harley-Davidson FXR2 Base
1999 Harley-Davidson FXR3 Base
1984-1992 Harley-Davidson FXRS Low Glide Base
1984-1992 Harley-Davidson FXRT Sport Glide Base
1984-1999 Harley-Davidson FXST Softail Standard Base
1999 Harley-Davidson FXSTB Night Train Base
1986-1999 Harley-Davidson FXSTC Softail Custom Base
1988-1999 Harley-Davidson FXSTS Springer Softail Base
1995-1997 Harley-Davidson FXSTSB Bad Boy Base
2016-2020 Harley-Davidson XL1200CX Roadster Base
2012-2016 Harley-Davidson XL1200V Seventy-Two Base
2010-2020 Harley-Davidson XL1200X Forty-Eight Base
1988-2003 Harley-Davidson XLH1200 Base

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 High-Performance Head Gaskets for Harley-Davidson Evo Engines

Ensure a perfect seal and maximize the performance of your Harley-Davidson Evolution (Evo) engine with Cometic's Heavy Duty Stock Bore Head Gaskets. These gaskets are precision-engineered for 3.500-inch bore applications and a thickness of .040 inches, providing a reliable solution for high-performance V-Twin engines.

Engineered for Extreme Conditions

Modern V-Twin engines produce significant horsepower and higher cylinder pressures. Cometic gaskets are designed to meet these demands:

  • Superior Sealing: Made from premium materials, these gaskets provide an exceptional seal under high temperatures and pressures, preventing leaks and blowouts.
  • Optimized Bore Size: Specifically designed for a 3.500-inch bore, ensuring a precise fit for stock bore Evo engines.
  • Correct Thickness: The .040-inch thickness is ideal for maintaining proper compression ratios in many performance applications.
  • Durable Construction: Built to withstand the rigors of performance riding, ensuring long-lasting reliability.

Application and Benefits

These Cometic head gaskets are suitable for a wide range of Harley-Davidson models equipped with the Evolution engine, from the mid-80s through the late 90s. They are essential for engine rebuilds, performance upgrades, or routine maintenance where a reliable seal is critical.

Key Features:

  • Heavy Duty construction for demanding applications
  • Designed for Harley-Davidson Evolution (Evo) engines
  • Stock bore size: 3.500 inches
  • Thickness: .040 inches
  • Provides a reliable and durable seal
  • Sold as a 2-pack

Trust Cometic Gasket for your V-Twin engine needs. Get your HD Evo Stock Bore Head Gaskets at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1997-1999 Harley-Davidson FLHR Road King Base
1998-1999 Harley-Davidson FLHRCI Road King Classic Base
1996-1997 Harley-Davidson FLHRI Road King Base
1984 Harley-Davidson FLHS Electra Glide Sport Base
1987-1993 Harley-Davidson FLHS Electra Glide Sport Base
1984-1999 Harley-Davidson FLHTC Electra Glide Classic Base
1996-1999 Harley-Davidson FLHTCI Electra Glide Classic Base
1989-1997 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1986-1990 Harley-Davidson FLST Heritage Softail Base
1988-1999 Harley-Davidson FLSTC Heritage Softail Classic Base
1990-1999 Harley-Davidson FLSTF Fat Boy Base
1994-1996 Harley-Davidson FLSTN Heritage Softail Special Base
1998-1999 Harley-Davidson FLTR Road Glide Base
1998-1999 Harley-Davidson FLTRI Road Glide Base
1995-1999 Harley-Davidson FXD Dyna Super Glide Base
1993-1999 Harley-Davidson FXDL Dyna Low Rider Base
1993-1999 Harley-Davidson FXDWG Dyna Wide Glide Base
1999 Harley-Davidson FXDX Dyna Super Glide Sport Base
1999 Harley-Davidson FXR2 Base
1999 Harley-Davidson FXR3 Base
1984-1992 Harley-Davidson FXRS Low Glide Base
1984-1992 Harley-Davidson FXRT Sport Glide Base
1984-1999 Harley-Davidson FXST Softail Standard Base
1999 Harley-Davidson FXSTB Night Train Base
1986-1999 Harley-Davidson FXSTC Softail Custom Base
1988-1999 Harley-Davidson FXSTS Springer Softail Base
1995-1997 Harley-Davidson FXSTSB Bad Boy Base
2016-2020 Harley-Davidson XL1200CX Roadster Base
2012-2016 Harley-Davidson XL1200V Seventy-Two Base
2010-2020 Harley-Davidson XL1200X Forty-Eight Base
1988-2003 Harley-Davidson XLH1200 Base

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