S&S Cycle 4-1/8in Bore Rocker Box Gasket Kit — Fits Harley-Davidson Big Twin

SKU: SSC90-4111
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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 S&S Cycle

S&S Cycle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full S&S Cycle lineup with fast shipping and expert fitment support — order with confidence.

S&S Cycle 4-1/8in Bore Rocker Box Gasket Kit for Harley-Davidson Big Twin

Optimize the performance and reliability of your Harley-Davidson Big Twin engine with the S&S Cycle 4-1/8 inch Bore Rocker Box Gasket Kit. This comprehensive kit is specifically designed for engines featuring a 4-1/8 inch bore, ensuring a precise and secure fit for critical sealing points within the rocker box assembly. S&S Cycle is a trusted name in high-performance V-twin components, and this gasket kit upholds their reputation for quality and durability.

Engineered for Performance:

  • Designed for 4-1/8 inch bore Harley-Davidson Big Twin engines.
  • Provides essential gaskets for the rocker box assembly.
  • Ensures a leak-free seal, preventing oil loss and contamination.
  • Manufactured by S&S Cycle to meet stringent quality standards.
  • Ideal for engine rebuilds, upgrades, or routine maintenance.

Proper sealing of the rocker boxes is paramount to maintaining oil pressure, preventing leaks, and keeping internal engine components free from dirt and debris. This S&S Cycle kit includes all the necessary gaskets to properly seal your rocker boxes, contributing to the overall health and longevity of your engine. Whether you are building a custom V-twin or maintaining a stock engine, using high-quality gaskets like these from S&S Cycle is a smart investment. This kit is compatible with a wide range of Harley-Davidson Big Twin models that utilize the 4-1/8 inch bore specification. Trust GGCRACING for your performance V-twin needs and get your S&S Cycle 4-1/8in Bore Rocker Box Gasket Kit today!

Vehicle Fitment

Years Make Model Trim
1999-2017 Harley-Davidson FLHR Road King Base
2007-2017 Harley-Davidson FLHRC Road King Classic Base
1999-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
1999-2000 Harley-Davidson FLHT Electra Glide Standard Base
2003 Harley-Davidson FLHT Electra Glide Standard Base
2006-2009 Harley-Davidson FLHT Electra Glide Standard Base
1999-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007-2013 Harley-Davidson FLHTC Electra Glide Classic Base
1999-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007-2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1999-2006 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
2010-2012 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
2015-2017 Harley-Davidson FLRT Freewheeler Base
2016-2017 Harley-Davidson FLSS Softail Slim S Base
2006 Harley-Davidson FLST Heritage Softail Base
1999-2017 Harley-Davidson FLSTC Heritage Softail Classic Base
2001-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
1999-2017 Harley-Davidson FLSTF Fat Boy Base
2010-2017 Harley-Davidson FLSTFB Fat Boy Lo Base
2016-2017 Harley-Davidson FLSTFBS Fat Boy S Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
2008-2011 Harley-Davidson FLSTSB Cross Bones Base
2010-2012 Harley-Davidson FLSTSE CVO Softail Convertible Base
1999-2013 Harley-Davidson FLTR Road Glide Base
2015-2016 Harley-Davidson FLTR Road Glide Base
1999-2006 Harley-Davidson FLTRI Road Glide Base
2011-2017 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
2008-2009 Harley-Davidson FXCW Rocker Base
2008-2011 Harley-Davidson FXCWC Rocker C Base
1999-2013 Harley-Davidson FXD Dyna Super Glide Base
1999-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007-2017 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2017 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
2001-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2011-2013 Harley-Davidson FXS Blackline Base
2013-2014 Harley-Davidson FXSBSE CVO Breakout Base
1999-2009 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
1999 Harley-Davidson FXSTC Softail Custom Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2000-2007 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
2001-2006 Harley-Davidson FXSTI Softail Standard Base

…and 2 additional fitments. Contact us to confirm yours.

Product Details

Product Description
Part Numbers
Sizing & Fit

About S&S Cycle

S&S Cycle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full S&S Cycle lineup with fast shipping and expert fitment support — order with confidence.

S&S Cycle 4-1/8in Bore Rocker Box Gasket Kit for Harley-Davidson Big Twin

Optimize the performance and reliability of your Harley-Davidson Big Twin engine with the S&S Cycle 4-1/8 inch Bore Rocker Box Gasket Kit. This comprehensive kit is specifically designed for engines featuring a 4-1/8 inch bore, ensuring a precise and secure fit for critical sealing points within the rocker box assembly. S&S Cycle is a trusted name in high-performance V-twin components, and this gasket kit upholds their reputation for quality and durability.

Engineered for Performance:

  • Designed for 4-1/8 inch bore Harley-Davidson Big Twin engines.
  • Provides essential gaskets for the rocker box assembly.
  • Ensures a leak-free seal, preventing oil loss and contamination.
  • Manufactured by S&S Cycle to meet stringent quality standards.
  • Ideal for engine rebuilds, upgrades, or routine maintenance.

Proper sealing of the rocker boxes is paramount to maintaining oil pressure, preventing leaks, and keeping internal engine components free from dirt and debris. This S&S Cycle kit includes all the necessary gaskets to properly seal your rocker boxes, contributing to the overall health and longevity of your engine. Whether you are building a custom V-twin or maintaining a stock engine, using high-quality gaskets like these from S&S Cycle is a smart investment. This kit is compatible with a wide range of Harley-Davidson Big Twin models that utilize the 4-1/8 inch bore specification. Trust GGCRACING for your performance V-twin needs and get your S&S Cycle 4-1/8in Bore Rocker Box Gasket Kit today!

Vehicle Fitment

Years Make Model Trim
1999-2017 Harley-Davidson FLHR Road King Base
2007-2017 Harley-Davidson FLHRC Road King Classic Base
1999-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
1999-2000 Harley-Davidson FLHT Electra Glide Standard Base
2003 Harley-Davidson FLHT Electra Glide Standard Base
2006-2009 Harley-Davidson FLHT Electra Glide Standard Base
1999-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007-2013 Harley-Davidson FLHTC Electra Glide Classic Base
1999-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007-2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1999-2006 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
2010-2012 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
2015-2017 Harley-Davidson FLRT Freewheeler Base
2016-2017 Harley-Davidson FLSS Softail Slim S Base
2006 Harley-Davidson FLST Heritage Softail Base
1999-2017 Harley-Davidson FLSTC Heritage Softail Classic Base
2001-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
1999-2017 Harley-Davidson FLSTF Fat Boy Base
2010-2017 Harley-Davidson FLSTFB Fat Boy Lo Base
2016-2017 Harley-Davidson FLSTFBS Fat Boy S Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
2008-2011 Harley-Davidson FLSTSB Cross Bones Base
2010-2012 Harley-Davidson FLSTSE CVO Softail Convertible Base
1999-2013 Harley-Davidson FLTR Road Glide Base
2015-2016 Harley-Davidson FLTR Road Glide Base
1999-2006 Harley-Davidson FLTRI Road Glide Base
2011-2017 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
2008-2009 Harley-Davidson FXCW Rocker Base
2008-2011 Harley-Davidson FXCWC Rocker C Base
1999-2013 Harley-Davidson FXD Dyna Super Glide Base
1999-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007-2017 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2017 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
2001-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2011-2013 Harley-Davidson FXS Blackline Base
2013-2014 Harley-Davidson FXSBSE CVO Breakout Base
1999-2009 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
1999 Harley-Davidson FXSTC Softail Custom Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2000-2007 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
2001-2006 Harley-Davidson FXSTI Softail Standard Base

…and 2 additional fitments. Contact us to confirm yours.

Product Details

Product Description

About S&S Cycle

S&S Cycle engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full S&S Cycle lineup with fast shipping and expert fitment support — order with confidence.

S&S Cycle 4-1/8in Bore Rocker Box Gasket Kit for Harley-Davidson Big Twin

Optimize the performance and reliability of your Harley-Davidson Big Twin engine with the S&S Cycle 4-1/8 inch Bore Rocker Box Gasket Kit. This comprehensive kit is specifically designed for engines featuring a 4-1/8 inch bore, ensuring a precise and secure fit for critical sealing points within the rocker box assembly. S&S Cycle is a trusted name in high-performance V-twin components, and this gasket kit upholds their reputation for quality and durability.

Engineered for Performance:

  • Designed for 4-1/8 inch bore Harley-Davidson Big Twin engines.
  • Provides essential gaskets for the rocker box assembly.
  • Ensures a leak-free seal, preventing oil loss and contamination.
  • Manufactured by S&S Cycle to meet stringent quality standards.
  • Ideal for engine rebuilds, upgrades, or routine maintenance.

Proper sealing of the rocker boxes is paramount to maintaining oil pressure, preventing leaks, and keeping internal engine components free from dirt and debris. This S&S Cycle kit includes all the necessary gaskets to properly seal your rocker boxes, contributing to the overall health and longevity of your engine. Whether you are building a custom V-twin or maintaining a stock engine, using high-quality gaskets like these from S&S Cycle is a smart investment. This kit is compatible with a wide range of Harley-Davidson Big Twin models that utilize the 4-1/8 inch bore specification. Trust GGCRACING for your performance V-twin needs and get your S&S Cycle 4-1/8in Bore Rocker Box Gasket Kit today!

Vehicle Fitment

Years Make Model Trim
1999-2017 Harley-Davidson FLHR Road King Base
2007-2017 Harley-Davidson FLHRC Road King Classic Base
1999-2006 Harley-Davidson FLHRCI Road King Classic Base
2000-2006 Harley-Davidson FLHRI Road King Base
2004-2007 Harley-Davidson FLHRS Road King Custom Base
1999-2000 Harley-Davidson FLHT Electra Glide Standard Base
2003 Harley-Davidson FLHT Electra Glide Standard Base
2006-2009 Harley-Davidson FLHT Electra Glide Standard Base
1999-2005 Harley-Davidson FLHTC Electra Glide Classic Base
2007-2013 Harley-Davidson FLHTC Electra Glide Classic Base
1999-2006 Harley-Davidson FLHTCI Electra Glide Classic Base
2007-2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
1999-2006 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
2010-2012 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
2015-2017 Harley-Davidson FLRT Freewheeler Base
2016-2017 Harley-Davidson FLSS Softail Slim S Base
2006 Harley-Davidson FLST Heritage Softail Base
1999-2017 Harley-Davidson FLSTC Heritage Softail Classic Base
2001-2006 Harley-Davidson FLSTCI Heritage Softail Classic Base
1999-2017 Harley-Davidson FLSTF Fat Boy Base
2010-2017 Harley-Davidson FLSTFB Fat Boy Lo Base
2016-2017 Harley-Davidson FLSTFBS Fat Boy S Base
2001-2006 Harley-Davidson FLSTFI Fat Boy Base
2008-2011 Harley-Davidson FLSTSB Cross Bones Base
2010-2012 Harley-Davidson FLSTSE CVO Softail Convertible Base
1999-2013 Harley-Davidson FLTR Road Glide Base
2015-2016 Harley-Davidson FLTR Road Glide Base
1999-2006 Harley-Davidson FLTRI Road Glide Base
2011-2017 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
2008-2009 Harley-Davidson FXCW Rocker Base
2008-2011 Harley-Davidson FXCWC Rocker C Base
1999-2013 Harley-Davidson FXD Dyna Super Glide Base
1999-2005 Harley-Davidson FXDL Dyna Low Rider Base
2007-2017 Harley-Davidson FXDL Dyna Low Rider Base
2004-2006 Harley-Davidson FXDLI Dyna Low Rider Base
1999-2017 Harley-Davidson FXDWG Dyna Wide Glide Base
2004-2006 Harley-Davidson FXDWGI Dyna Wide Glide Base
1999-2005 Harley-Davidson FXDX Dyna Super Glide Sport Base
2001-2003 Harley-Davidson FXDXT Dyna Super Glide T-Sport Base
2011-2013 Harley-Davidson FXS Blackline Base
2013-2014 Harley-Davidson FXSBSE CVO Breakout Base
1999-2009 Harley-Davidson FXSTB Night Train Base
2001-2006 Harley-Davidson FXSTBI Night Train Base
1999 Harley-Davidson FXSTC Softail Custom Base
2007-2010 Harley-Davidson FXSTC Softail Custom Base
2000-2007 Harley-Davidson FXSTD Softail Deuce Base
2001-2006 Harley-Davidson FXSTDI Softail Deuce Base
2001-2006 Harley-Davidson FXSTI Softail Standard Base

…and 2 additional fitments. Contact us to confirm yours.

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