Cometic Engine Kit for Harley-Davidson 03+ Twin Cam (Std Bore, Valve Seal) — Gasket Kits

SKU: CGSC9146
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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.

Watch in action

Cometic Engine Kit for 2003+ Harley-Davidson Twin Cam Models

Ensure peak performance and reliability for your 2003 and newer Harley-Davidson Twin Cam engine with this comprehensive Engine Kit from Cometic Gasket. This kit includes all necessary gaskets for a standard bore engine rebuild, along with new "hat" style valve seals, providing a complete sealing solution for your V-twin.

Complete Sealing Solution:

  • Vehicle Fitment: Designed for 2003 and later Harley-Davidson Twin Cam engines with standard bore configurations.
  • Comprehensive Kit: Includes all essential gaskets for engine assembly, ensuring a perfect fit.
  • New Hat Valve Seals: Features updated "hat" style valve seals for improved performance and longevity.
  • High-Quality Materials: Cometic uses premium materials engineered to withstand high temperatures and pressures.
  • Reliable Performance: Guarantees a leak-free seal, crucial for maintaining engine power and preventing oil consumption.

Cometic Gasket is committed to delivering innovative sealing solutions that meet the evolving demands of modern engines. Proudly manufactured in the USA using American-sourced materials, their gaskets are built for durability and exceptional performance. This engine kit is ideal for engine rebuilds, performance upgrades, or routine maintenance, providing the confidence that comes with using top-tier components. By addressing critical sealing points, including the valve seals, this kit helps ensure your Twin Cam engine runs smoother, cooler, and more powerfully. Trust Cometic for the quality and precision your Harley-Davidson deserves.

Invest in the best for your Twin Cam engine. Get this Cometic Engine Kit today at GGCRACING!

Vehicle Fitment

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

Watch in action

Cometic Engine Kit for 2003+ Harley-Davidson Twin Cam Models

Ensure peak performance and reliability for your 2003 and newer Harley-Davidson Twin Cam engine with this comprehensive Engine Kit from Cometic Gasket. This kit includes all necessary gaskets for a standard bore engine rebuild, along with new "hat" style valve seals, providing a complete sealing solution for your V-twin.

Complete Sealing Solution:

  • Vehicle Fitment: Designed for 2003 and later Harley-Davidson Twin Cam engines with standard bore configurations.
  • Comprehensive Kit: Includes all essential gaskets for engine assembly, ensuring a perfect fit.
  • New Hat Valve Seals: Features updated "hat" style valve seals for improved performance and longevity.
  • High-Quality Materials: Cometic uses premium materials engineered to withstand high temperatures and pressures.
  • Reliable Performance: Guarantees a leak-free seal, crucial for maintaining engine power and preventing oil consumption.

Cometic Gasket is committed to delivering innovative sealing solutions that meet the evolving demands of modern engines. Proudly manufactured in the USA using American-sourced materials, their gaskets are built for durability and exceptional performance. This engine kit is ideal for engine rebuilds, performance upgrades, or routine maintenance, providing the confidence that comes with using top-tier components. By addressing critical sealing points, including the valve seals, this kit helps ensure your Twin Cam engine runs smoother, cooler, and more powerfully. Trust Cometic for the quality and precision your Harley-Davidson deserves.

Invest in the best for your Twin Cam engine. Get this Cometic Engine Kit today at GGCRACING!

Vehicle Fitment

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

Watch in action

Cometic Engine Kit for 2003+ Harley-Davidson Twin Cam Models

Ensure peak performance and reliability for your 2003 and newer Harley-Davidson Twin Cam engine with this comprehensive Engine Kit from Cometic Gasket. This kit includes all necessary gaskets for a standard bore engine rebuild, along with new "hat" style valve seals, providing a complete sealing solution for your V-twin.

Complete Sealing Solution:

  • Vehicle Fitment: Designed for 2003 and later Harley-Davidson Twin Cam engines with standard bore configurations.
  • Comprehensive Kit: Includes all essential gaskets for engine assembly, ensuring a perfect fit.
  • New Hat Valve Seals: Features updated "hat" style valve seals for improved performance and longevity.
  • High-Quality Materials: Cometic uses premium materials engineered to withstand high temperatures and pressures.
  • Reliable Performance: Guarantees a leak-free seal, crucial for maintaining engine power and preventing oil consumption.

Cometic Gasket is committed to delivering innovative sealing solutions that meet the evolving demands of modern engines. Proudly manufactured in the USA using American-sourced materials, their gaskets are built for durability and exceptional performance. This engine kit is ideal for engine rebuilds, performance upgrades, or routine maintenance, providing the confidence that comes with using top-tier components. By addressing critical sealing points, including the valve seals, this kit helps ensure your Twin Cam engine runs smoother, cooler, and more powerfully. Trust Cometic for the quality and precision your Harley-Davidson deserves.

Invest in the best for your Twin Cam engine. Get this Cometic Engine Kit today at GGCRACING!

Vehicle Fitment

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