Cometic Head Gasket .030 Top End 3.937" Bore — Fits Harley-Davidson Twin Cam 1999-2017

SKU: CGSC10034
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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 Twin Cam Head Gasket - 3.937" Bore, .030" Thickness

Maintain optimal engine performance and prevent leaks with this high-quality Cometic Head Gasket, specifically designed for Harley-Davidson Twin Cam engines. Featuring a 3.937-inch bore and a .030-inch thickness, this gasket provides a superior seal for the top end of your engine. It's engineered to withstand the high pressures and temperatures characteristic of Twin Cam powerplants, ensuring reliability and longevity for your ride.

Engineered for Performance:

  • Precise Fitment: Designed for Harley-Davidson Twin Cam engines manufactured between 1999 and 2017.
  • Optimized Bore Size: The 3.937-inch bore is ideal for engines with a slightly increased displacement or specific performance modifications.
  • .030" Thickness: This thickness is crucial for achieving the correct compression ratio and ensuring a perfect seal between the cylinder head and the cylinder.
  • Durable Construction: Cometic gaskets are known for their robust materials and construction, offering excellent resistance to heat, pressure, and chemicals.
  • Reliable Sealing: Ensures a leak-free combustion chamber, protecting against oil and coolant contamination and maintaining engine integrity.

This Cometic Head Gasket is an essential component for engine rebuilds, performance upgrades, or routine maintenance on your Harley-Davidson Twin Cam motorcycle. Trust Cometic Gasket for precision and durability. Find this and other quality engine components at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2017 Harley-Davidson FLHR Road King Base
2007-2013 Harley-Davidson FLHRC Road King Classic Base
2002-2006 Harley-Davidson FLHRCI Road King Classic Base
2002-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
2003 Harley-Davidson FLHT Electra Glide Standard Base
2006-2009 Harley-Davidson FLHT Electra Glide Standard Base
2002-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007-2013 Harley-Davidson FLHTC Electra Glide Classic Base
2002-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007-2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
2002-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2009-2013 Harley-Davidson FLHTCUTG Tri Glide Ultra Classic Base
2015-2017 Harley-Davidson FLHTKL Ultra Limited Low Base
2014-2017 Harley-Davidson FLHTKSE CVO Limited Base
2006-2017 Harley-Davidson FLHX Street Glide Base
2014-2017 Harley-Davidson FLHXS Street Glide Special Base
2010 Harley-Davidson FLHXSE CVO Street Glide Base
2015-2017 Harley-Davidson FLHXSE CVO Street Glide Base
2010-2011 Harley-Davidson FLHXXX Street Glide Trike Base
2006 Harley-Davidson FLST Heritage Softail Base
2002-2017 Harley-Davidson FLSTC Heritage Softail Classic Base
2002-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
2002-2017 Harley-Davidson FLSTF Fat Boy Base
2010-2017 Harley-Davidson FLSTFB Fat Boy Lo Base
2002-2006 Harley-Davidson FLSTFI Fat Boy Base
2008-2011 Harley-Davidson FLSTSB Cross Bones Base
2010 Harley-Davidson FLSTSE CVO Softail Convertible Base
2002-2010 Harley-Davidson FLTR Road Glide Base
2016 Harley-Davidson FLTR Road Glide Base
2002-2006 Harley-Davidson FLTRI Road Glide Base
2011-2013 Harley-Davidson FLTRU Road Glide Ultra Base
2016-2017 Harley-Davidson FLTRU Road Glide Ultra Base
2011 Harley-Davidson FLTRUSE CVO Road Glide Ultra Base
2015-2016 Harley-Davidson FLTRUSE CVO Road Glide Ultra Base
2010-2013 Harley-Davidson FLTRX Road Glide Custom Base
2015-2017 Harley-Davidson FLTRXS Road Glide Special Base
2012 Harley-Davidson FLTRXSE CVO Road Glide Custom Base
2002-2010 Harley-Davidson FXD Dyna Super Glide Base
2002-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007-2009 Harley-Davidson FXDL Dyna Low Rider Base
2014-2017 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
2002-2008 Harley-Davidson FXDWG Dyna Wide Glide Base
2010-2017 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
2002-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
2002-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2002-2009 Harley-Davidson FXSTB Night Train Base
2002-2006 Harley-Davidson FXSTBI Night Train Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2002-2007 Harley-Davidson FXSTD Softail Deuce Base
2002-2006 Harley-Davidson FXSTDI Softail Deuce Base
2003-2004 Harley-Davidson FXSTDSE Screamin Eagle Softail Deuce Base
2002-2006 Harley-Davidson FXSTI Softail Standard Base
2002-2006 Harley-Davidson FXSTS Springer Softail Base
2002-2006 Harley-Davidson FXSTSI Springer Softail Base
2007 Harley-Davidson FXSTSSE Screamin Eagle Softail Springer Base
2009 Harley-Davidson FXSTSSE3 CVO Softail Springer 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 Twin Cam Head Gasket - 3.937" Bore, .030" Thickness

Maintain optimal engine performance and prevent leaks with this high-quality Cometic Head Gasket, specifically designed for Harley-Davidson Twin Cam engines. Featuring a 3.937-inch bore and a .030-inch thickness, this gasket provides a superior seal for the top end of your engine. It's engineered to withstand the high pressures and temperatures characteristic of Twin Cam powerplants, ensuring reliability and longevity for your ride.

Engineered for Performance:

  • Precise Fitment: Designed for Harley-Davidson Twin Cam engines manufactured between 1999 and 2017.
  • Optimized Bore Size: The 3.937-inch bore is ideal for engines with a slightly increased displacement or specific performance modifications.
  • .030" Thickness: This thickness is crucial for achieving the correct compression ratio and ensuring a perfect seal between the cylinder head and the cylinder.
  • Durable Construction: Cometic gaskets are known for their robust materials and construction, offering excellent resistance to heat, pressure, and chemicals.
  • Reliable Sealing: Ensures a leak-free combustion chamber, protecting against oil and coolant contamination and maintaining engine integrity.

This Cometic Head Gasket is an essential component for engine rebuilds, performance upgrades, or routine maintenance on your Harley-Davidson Twin Cam motorcycle. Trust Cometic Gasket for precision and durability. Find this and other quality engine components at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2017 Harley-Davidson FLHR Road King Base
2007-2013 Harley-Davidson FLHRC Road King Classic Base
2002-2006 Harley-Davidson FLHRCI Road King Classic Base
2002-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
2003 Harley-Davidson FLHT Electra Glide Standard Base
2006-2009 Harley-Davidson FLHT Electra Glide Standard Base
2002-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007-2013 Harley-Davidson FLHTC Electra Glide Classic Base
2002-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007-2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
2002-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2009-2013 Harley-Davidson FLHTCUTG Tri Glide Ultra Classic Base
2015-2017 Harley-Davidson FLHTKL Ultra Limited Low Base
2014-2017 Harley-Davidson FLHTKSE CVO Limited Base
2006-2017 Harley-Davidson FLHX Street Glide Base
2014-2017 Harley-Davidson FLHXS Street Glide Special Base
2010 Harley-Davidson FLHXSE CVO Street Glide Base
2015-2017 Harley-Davidson FLHXSE CVO Street Glide Base
2010-2011 Harley-Davidson FLHXXX Street Glide Trike Base
2006 Harley-Davidson FLST Heritage Softail Base
2002-2017 Harley-Davidson FLSTC Heritage Softail Classic Base
2002-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
2002-2017 Harley-Davidson FLSTF Fat Boy Base
2010-2017 Harley-Davidson FLSTFB Fat Boy Lo Base
2002-2006 Harley-Davidson FLSTFI Fat Boy Base
2008-2011 Harley-Davidson FLSTSB Cross Bones Base
2010 Harley-Davidson FLSTSE CVO Softail Convertible Base
2002-2010 Harley-Davidson FLTR Road Glide Base
2016 Harley-Davidson FLTR Road Glide Base
2002-2006 Harley-Davidson FLTRI Road Glide Base
2011-2013 Harley-Davidson FLTRU Road Glide Ultra Base
2016-2017 Harley-Davidson FLTRU Road Glide Ultra Base
2011 Harley-Davidson FLTRUSE CVO Road Glide Ultra Base
2015-2016 Harley-Davidson FLTRUSE CVO Road Glide Ultra Base
2010-2013 Harley-Davidson FLTRX Road Glide Custom Base
2015-2017 Harley-Davidson FLTRXS Road Glide Special Base
2012 Harley-Davidson FLTRXSE CVO Road Glide Custom Base
2002-2010 Harley-Davidson FXD Dyna Super Glide Base
2002-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007-2009 Harley-Davidson FXDL Dyna Low Rider Base
2014-2017 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
2002-2008 Harley-Davidson FXDWG Dyna Wide Glide Base
2010-2017 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
2002-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
2002-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2002-2009 Harley-Davidson FXSTB Night Train Base
2002-2006 Harley-Davidson FXSTBI Night Train Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2002-2007 Harley-Davidson FXSTD Softail Deuce Base
2002-2006 Harley-Davidson FXSTDI Softail Deuce Base
2003-2004 Harley-Davidson FXSTDSE Screamin Eagle Softail Deuce Base
2002-2006 Harley-Davidson FXSTI Softail Standard Base
2002-2006 Harley-Davidson FXSTS Springer Softail Base
2002-2006 Harley-Davidson FXSTSI Springer Softail Base
2007 Harley-Davidson FXSTSSE Screamin Eagle Softail Springer Base
2009 Harley-Davidson FXSTSSE3 CVO Softail Springer 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 Twin Cam Head Gasket - 3.937" Bore, .030" Thickness

Maintain optimal engine performance and prevent leaks with this high-quality Cometic Head Gasket, specifically designed for Harley-Davidson Twin Cam engines. Featuring a 3.937-inch bore and a .030-inch thickness, this gasket provides a superior seal for the top end of your engine. It's engineered to withstand the high pressures and temperatures characteristic of Twin Cam powerplants, ensuring reliability and longevity for your ride.

Engineered for Performance:

  • Precise Fitment: Designed for Harley-Davidson Twin Cam engines manufactured between 1999 and 2017.
  • Optimized Bore Size: The 3.937-inch bore is ideal for engines with a slightly increased displacement or specific performance modifications.
  • .030" Thickness: This thickness is crucial for achieving the correct compression ratio and ensuring a perfect seal between the cylinder head and the cylinder.
  • Durable Construction: Cometic gaskets are known for their robust materials and construction, offering excellent resistance to heat, pressure, and chemicals.
  • Reliable Sealing: Ensures a leak-free combustion chamber, protecting against oil and coolant contamination and maintaining engine integrity.

This Cometic Head Gasket is an essential component for engine rebuilds, performance upgrades, or routine maintenance on your Harley-Davidson Twin Cam motorcycle. Trust Cometic Gasket for precision and durability. Find this and other quality engine components at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2002-2017 Harley-Davidson FLHR Road King Base
2007-2013 Harley-Davidson FLHRC Road King Classic Base
2002-2006 Harley-Davidson FLHRCI Road King Classic Base
2002-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
2003 Harley-Davidson FLHT Electra Glide Standard Base
2006-2009 Harley-Davidson FLHT Electra Glide Standard Base
2002-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007-2013 Harley-Davidson FLHTC Electra Glide Classic Base
2002-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007-2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
2002-2006 Harley-Davidson FLHTCUI Electra Glide Ultra Classic Base
2009-2013 Harley-Davidson FLHTCUTG Tri Glide Ultra Classic Base
2015-2017 Harley-Davidson FLHTKL Ultra Limited Low Base
2014-2017 Harley-Davidson FLHTKSE CVO Limited Base
2006-2017 Harley-Davidson FLHX Street Glide Base
2014-2017 Harley-Davidson FLHXS Street Glide Special Base
2010 Harley-Davidson FLHXSE CVO Street Glide Base
2015-2017 Harley-Davidson FLHXSE CVO Street Glide Base
2010-2011 Harley-Davidson FLHXXX Street Glide Trike Base
2006 Harley-Davidson FLST Heritage Softail Base
2002-2017 Harley-Davidson FLSTC Heritage Softail Classic Base
2002-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
2002-2017 Harley-Davidson FLSTF Fat Boy Base
2010-2017 Harley-Davidson FLSTFB Fat Boy Lo Base
2002-2006 Harley-Davidson FLSTFI Fat Boy Base
2008-2011 Harley-Davidson FLSTSB Cross Bones Base
2010 Harley-Davidson FLSTSE CVO Softail Convertible Base
2002-2010 Harley-Davidson FLTR Road Glide Base
2016 Harley-Davidson FLTR Road Glide Base
2002-2006 Harley-Davidson FLTRI Road Glide Base
2011-2013 Harley-Davidson FLTRU Road Glide Ultra Base
2016-2017 Harley-Davidson FLTRU Road Glide Ultra Base
2011 Harley-Davidson FLTRUSE CVO Road Glide Ultra Base
2015-2016 Harley-Davidson FLTRUSE CVO Road Glide Ultra Base
2010-2013 Harley-Davidson FLTRX Road Glide Custom Base
2015-2017 Harley-Davidson FLTRXS Road Glide Special Base
2012 Harley-Davidson FLTRXSE CVO Road Glide Custom Base
2002-2010 Harley-Davidson FXD Dyna Super Glide Base
2002-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007-2009 Harley-Davidson FXDL Dyna Low Rider Base
2014-2017 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
2002-2008 Harley-Davidson FXDWG Dyna Wide Glide Base
2010-2017 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
2002-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
2002-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2002-2009 Harley-Davidson FXSTB Night Train Base
2002-2006 Harley-Davidson FXSTBI Night Train Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2002-2007 Harley-Davidson FXSTD Softail Deuce Base
2002-2006 Harley-Davidson FXSTDI Softail Deuce Base
2003-2004 Harley-Davidson FXSTDSE Screamin Eagle Softail Deuce Base
2002-2006 Harley-Davidson FXSTI Softail Standard Base
2002-2006 Harley-Davidson FXSTS Springer Softail Base
2002-2006 Harley-Davidson FXSTSI Springer Softail Base
2007 Harley-Davidson FXSTSSE Screamin Eagle Softail Springer Base
2009 Harley-Davidson FXSTSSE3 CVO Softail Springer Base

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