Cometic HD S/S Head Gasket - 3.670in 3 5/8in Bore, Evo Motors .030in (2 Pack)

SKU: CGSC9690
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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 Heavy Duty Stainless Steel Head Gaskets for Evo Motors

Maximize the performance and reliability of your Harley-Davidson Evolution (Evo) engine with these Heavy Duty (HD) Stainless Steel Head Gaskets from Cometic. Engineered to handle the increased demands of high-horsepower builds, these gaskets provide superior sealing under extreme conditions, including higher cylinder pressures and temperatures.

Product Specifications:

  • Engine Type: Harley-Davidson Evolution (Evo) Motors
  • Bore Size: 3.670 inches (equivalent to 3 5/8 inches)
  • Thickness: .030 inches
  • Material: High-quality Stainless Steel (S/S) for exceptional durability
  • Quantity: Sold as a 2-pack for both cylinder heads
  • Construction: Designed for high clamp loads and extreme temperatures

Cometic Gasket is renowned for its commitment to quality and innovation, producing gaskets that meet the rigorous demands of performance engines. These gaskets are proudly made in the USA, utilizing materials manufactured on American soil. Whether you're building a custom V-Twin or enhancing your street bike, Cometic ensures optimal engine performance and longevity. This specific gasket fits a wide range of Harley-Davidson models from the 1980s and beyond, ensuring a precise fit for your application.

Ensure your Evo engine performs at its peak. Get your Cometic HD S/S Head Gaskets today 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

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 Heavy Duty Stainless Steel Head Gaskets for Evo Motors

Maximize the performance and reliability of your Harley-Davidson Evolution (Evo) engine with these Heavy Duty (HD) Stainless Steel Head Gaskets from Cometic. Engineered to handle the increased demands of high-horsepower builds, these gaskets provide superior sealing under extreme conditions, including higher cylinder pressures and temperatures.

Product Specifications:

  • Engine Type: Harley-Davidson Evolution (Evo) Motors
  • Bore Size: 3.670 inches (equivalent to 3 5/8 inches)
  • Thickness: .030 inches
  • Material: High-quality Stainless Steel (S/S) for exceptional durability
  • Quantity: Sold as a 2-pack for both cylinder heads
  • Construction: Designed for high clamp loads and extreme temperatures

Cometic Gasket is renowned for its commitment to quality and innovation, producing gaskets that meet the rigorous demands of performance engines. These gaskets are proudly made in the USA, utilizing materials manufactured on American soil. Whether you're building a custom V-Twin or enhancing your street bike, Cometic ensures optimal engine performance and longevity. This specific gasket fits a wide range of Harley-Davidson models from the 1980s and beyond, ensuring a precise fit for your application.

Ensure your Evo engine performs at its peak. Get your Cometic HD S/S Head Gaskets today 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

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 Heavy Duty Stainless Steel Head Gaskets for Evo Motors

Maximize the performance and reliability of your Harley-Davidson Evolution (Evo) engine with these Heavy Duty (HD) Stainless Steel Head Gaskets from Cometic. Engineered to handle the increased demands of high-horsepower builds, these gaskets provide superior sealing under extreme conditions, including higher cylinder pressures and temperatures.

Product Specifications:

  • Engine Type: Harley-Davidson Evolution (Evo) Motors
  • Bore Size: 3.670 inches (equivalent to 3 5/8 inches)
  • Thickness: .030 inches
  • Material: High-quality Stainless Steel (S/S) for exceptional durability
  • Quantity: Sold as a 2-pack for both cylinder heads
  • Construction: Designed for high clamp loads and extreme temperatures

Cometic Gasket is renowned for its commitment to quality and innovation, producing gaskets that meet the rigorous demands of performance engines. These gaskets are proudly made in the USA, utilizing materials manufactured on American soil. Whether you're building a custom V-Twin or enhancing your street bike, Cometic ensures optimal engine performance and longevity. This specific gasket fits a wide range of Harley-Davidson models from the 1980s and beyond, ensuring a precise fit for your application.

Ensure your Evo engine performs at its peak. Get your Cometic HD S/S Head Gaskets today 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

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