S&S Cycle 07-17 BT 107in Bolt-In Big Bore Kit - Silver

This bolt-in big bore kit is easy to install, and requires no machining or rebalancing. This is the largest bore (3.937") that can be fit in a stock engine case. Stock engine height is maintained so there are no manifold or frame fitment issues. The S&S 11 fin cylinder design closely resembles OEM shape and come prefinished - ready to install. Cylinders feature increased fin area for better heat dissipation, and the centrifugal cast, gray iron liner features 40,000 psi tensile strength for superior wear and performance. The pistons in this kit have a 3cc pop-up dome for slightly higher compression rato. This is one reason to choose and S&S 107" kit over the S&S 106" kit which has slightly less compression.

Enhance your Harley Davidson with the S&S Cycle 07-17 BT 107 inch Bolt-In Big Bore Kit, expertly designed for models from 2008 to 2009. This kit allows for easy installation without the need for machining or rebalancing, making it a straightforward upgrade for your engine. The kit features the largest bore size of 3.937 inches that can be accommodated in a stock engine case, ensuring maximum performance gains while maintaining stock engine height to prevent manifold or frame fitment issues. The cylinders are constructed with a durable centrifugal cast gray iron liner that boasts a tensile strength of 40,000 psi, providing superior wear resistance and performance under demanding conditions. The cylinders are finished and resemble OEM shapes, complete with increased fin area for improved heat dissipation, which helps maintain optimal operating temperatures during extended riding sessions. The pistons are equipped with a 3cc pop-up dome, offering a slightly higher compression ratio that enhances power output and throttle response compared to standard configurations. This feature makes the S&S 107-inch kit a preferred choice over the 106-inch variant for riders seeking more compression and performance. Designed specifically for powersports applications, this kit is not carb approved but requires acknowledgment of this fact during installation. It is important to note that this product is not available for air freight and is not classified as a regular stock item, emphasizing its specialized nature. The bolt-in design ensures a clean installation with minimal downtime, allowing riders to quickly enjoy the benefits of increased displacement, improved heat management, and enhanced engine durability. Suitable for several Harley Davidson models such as the Road King, Street Glide, and Road Glide from 2008 and 2009, this kit is an excellent upgrade for riders aiming to boost their motorcycle’s performance without extensive modifications.

Features:

• Largest bore size of 3.937 inches available for stock Harley Davidson cases

• Bolt-in installation requiring no machining or rebalancing

• Cylinders feature increased fin area for better heat dissipation

• Constructed with centrifugal cast gray iron liner with 40,000 psi tensile strength

• Pistons with 3cc pop-up dome for higher compression ratio

• Designed to fit multiple Harley Davidson models from 2008 to 2009

• Maintains stock engine height to prevent manifold or frame fitment issues

• Pre-finished cylinders with OEM-like shape for seamless installation

• Ideal for riders seeking increased power and engine durability

Fitment:
Harley Davidson FLHR Road King Base 2007
Harley Davidson FLHR Road King Base 2008
Harley Davidson FLHR Road King Base 2009
Harley Davidson FLHR Road King Base 2010
Harley Davidson FLHR Road King Base 2011
Harley Davidson FLHR Road King Base 2012
Harley Davidson FLHR Road King Base 2013
Harley Davidson FLHR Road King Base 2014
Harley Davidson FLHR Road King Base 2015
Harley Davidson FLHR Road King Base 2016
Harley Davidson FLHR Road King Base 2017
Harley Davidson FLHRC Road King Classic Base 2007
Harley Davidson FLHRC Road King Classic Base 2008
Harley Davidson FLHRC Road King Classic Base 2009
Harley Davidson FLHRC Road King Classic Base 2010
Harley Davidson FLHRC Road King Classic Base 2011
Harley Davidson FLHRC Road King Classic Base 2012
Harley Davidson FLHRC Road King Classic Base 2013
Harley Davidson FLHRS Road King Custom Base 2007
Harley Davidson FLHT Electra Glide Standard Base 2007
Harley Davidson FLHT Electra Glide Standard Base 2008
Harley Davidson FLHT Electra Glide Standard Base 2009
Harley Davidson FLHTC Electra Glide Classic Base 2007
Harley Davidson FLHTC Electra Glide Classic Base 2008
Harley Davidson FLHTC Electra Glide Classic Base 2009
Harley Davidson FLHTC Electra Glide Classic Base 2010
Harley Davidson FLHTC Electra Glide Classic Base 2011
Harley Davidson FLHTC Electra Glide Classic Base 2012
Harley Davidson FLHTC Electra Glide Classic Base 2013
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2007
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2008
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2009
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2010
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2011
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2012
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2013
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2014
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2015
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2016
Harley Davidson FLHTCU Electra Glide Ultra Classic Base 2017
Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2009
Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2010
Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2011
Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2012
Harley Davidson FLHTCUTG Tri Glide Ultra Classic Base 2013
Harley Davidson FLHTKL Ultra Limited Low Base 2015
Harley Davidson FLHTKL Ultra Limited Low Base 2016
Harley Davidson FLHTKL Ultra Limited Low Base 2017
Harley Davidson FLHTKSE CVO Limited Base 2014
Harley Davidson FLHTKSE CVO Limited Base 2015
Harley Davidson FLHTKSE CVO Limited Base 2016
Harley Davidson FLHTKSE CVO Limited Base 2017
Harley Davidson FLHX Street Glide Base 2007
Harley Davidson FLHX Street Glide Base 2008
Harley Davidson FLHX Street Glide Base 2009
Harley Davidson FLHX Street Glide Base 2010
Harley Davidson FLHX Street Glide Base 2011
Harley Davidson FLHX Street Glide Base 2012
Harley Davidson FLHX Street Glide Base 2013
Harley Davidson FLHX Street Glide Base 2014
Harley Davidson FLHX Street Glide Base 2015
Harley Davidson FLHX Street Glide Base 2016
Harley Davidson FLHX Street Glide Base 2017
Harley Davidson FLHXS Street Glide Special Base 2014
Harley Davidson FLHXS Street Glide Special Base 2015
Harley Davidson FLHXS Street Glide Special Base 2016
Harley Davidson FLHXS Street Glide Special Base 2017
Harley Davidson FLHXSE CVO Street Glide Base 2010
Harley Davidson FLHXSE CVO Street Glide Base 2015
Harley Davidson FLHXSE CVO Street Glide Base 2016
Harley Davidson FLHXSE CVO Street Glide Base 2017
Harley Davidson FLHXXX Street Glide Trike Base 2010
Harley Davidson FLHXXX Street Glide Trike Base 2011
Harley Davidson FLRT Freewheeler Base 2015
Harley Davidson FLRT Freewheeler Base 2016
Harley Davidson FLRT Freewheeler Base 2017
Harley Davidson FLSS Softail Slim S Base 2016
Harley Davidson FLSS Softail Slim S Base 2017
Harley Davidson FLSTC Heritage Softail Classic Base 2007
Harley Davidson FLSTC Heritage Softail Classic Base 2008
Harley Davidson FLSTC Heritage Softail Classic Base 2009
Harley Davidson FLSTC Heritage Softail Classic Base 2010
Harley Davidson FLSTC Heritage Softail Classic Base 2011
Harley Davidson FLSTC Heritage Softail Classic Base 2012
Harley Davidson FLSTC Heritage Softail Classic Base 2013
Harley Davidson FLSTC Heritage Softail Classic Base 2014
Harley Davidson FLSTC Heritage Softail Classic Base 2015
Harley Davidson FLSTC Heritage Softail Classic Base 2016
Harley Davidson FLSTC Heritage Softail Classic Base 2017
Harley Davidson FLSTF Fat Boy Base 2007
Harley Davidson FLSTF Fat Boy Base 2008
Harley Davidson FLSTF Fat Boy Base 2009
Harley Davidson FLSTF Fat Boy Base 2010
Harley Davidson FLSTF Fat Boy Base 2011
Harley Davidson FLSTF Fat Boy Base 2012
Harley Davidson FLSTF Fat Boy Base 2013
Harley Davidson FLSTF Fat Boy Base 2014
Harley Davidson FLSTF Fat Boy Base 2015
Harley Davidson FLSTF Fat Boy Base 2016
Harley Davidson FLSTF Fat Boy Base 2017
Harley Davidson FLSTFB Fat Boy Lo Base 2010
Harley Davidson FLSTFB Fat Boy Lo Base 2011
Harley Davidson FLSTFB Fat Boy Lo Base 2012
Harley Davidson FLSTFB Fat Boy Lo Base 2013
Harley Davidson FLSTFB Fat Boy Lo Base 2014
Harley Davidson FLSTFB Fat Boy Lo Base 2015
Harley Davidson FLSTFB Fat Boy Lo Base 2016
Harley Davidson FLSTFB Fat Boy Lo Base 2017
Harley Davidson FLSTFBS Fat Boy S Base 2016
Harley Davidson FLSTFBS Fat Boy S Base 2017
Harley Davidson FLSTSB Cross Bones Base 2008
Harley Davidson FLSTSB Cross Bones Base 2009
Harley Davidson FLSTSB Cross Bones Base 2010
Harley Davidson FLSTSB Cross Bones Base 2011
Harley Davidson FLSTSE CVO Softail Convertible Base 2010
Harley Davidson FLTR Road Glide Base 2007
Harley Davidson FLTR Road Glide Base 2008
Harley Davidson FLTR Road Glide Base 2009
Harley Davidson FLTR Road Glide Base 2010
Harley Davidson FLTR Road Glide Base 2016
Harley Davidson FLTRU Road Glide Ultra Base 2011
Harley Davidson FLTRU Road Glide Ultra Base 2012
Harley Davidson FLTRU Road Glide Ultra Base 2013
Harley Davidson FLTRU Road Glide Ultra Base 2016
Harley Davidson FLTRU Road Glide Ultra Base 2017
Harley Davidson FLTRUSE CVO Road Glide Ultra Base 2011
Harley Davidson FLTRUSE CVO Road Glide Ultra Base 2015
Harley Davidson FLTRUSE CVO Road Glide Ultra Base 2016
Harley Davidson FLTRX Road Glide Base 2015
Harley Davidson FLTRX Road Glide Base 2016
Harley Davidson FLTRX Road Glide Base 2017
Harley Davidson FLTRX Road Glide Custom Base 2010
Harley Davidson FLTRX Road Glide Custom Base 2011
Harley Davidson FLTRX Road Glide Custom Base 2012
Harley Davidson FLTRX Road Glide Custom Base 2013
Harley Davidson FLTRXS Road Glide Special Base 2015
Harley Davidson FLTRXS Road Glide Special Base 2016
Harley Davidson FLTRXS Road Glide Special Base 2017
Harley Davidson FLTRXSE CVO Road Glide Custom Base 2012
Harley Davidson FXCW Rocker Base 2008
Harley Davidson FXCW Rocker Base 2009
Harley Davidson FXCWC Rocker C Base 2008
Harley Davidson FXCWC Rocker C Base 2009
Harley Davidson FXCWC Rocker C Base 2010
Harley Davidson FXCWC Rocker C Base 2011
Harley Davidson FXD Dyna Super Glide Base 2007
Harley Davidson FXD Dyna Super Glide Base 2008
Harley Davidson FXD Dyna Super Glide Base 2009
Harley Davidson FXD Dyna Super Glide Base 2010
Harley Davidson FXDL Dyna Low Rider Base 2007
Harley Davidson FXDL Dyna Low Rider Base 2008
Harley Davidson FXDL Dyna Low Rider Base 2009
Harley Davidson FXDL Dyna Low Rider Base 2014
Harley Davidson FXDL Dyna Low Rider Base 2015
Harley Davidson FXDL Dyna Low Rider Base 2016
Harley Davidson FXDL Dyna Low Rider Base 2017
Harley Davidson FXDWG Dyna Wide Glide Base 2007
Harley Davidson FXDWG Dyna Wide Glide Base 2008
Harley Davidson FXDWG Dyna Wide Glide Base 2010
Harley Davidson FXDWG Dyna Wide Glide Base 2011
Harley Davidson FXDWG Dyna Wide Glide Base 2012
Harley Davidson FXDWG Dyna Wide Glide Base 2013
Harley Davidson FXDWG Dyna Wide Glide Base 2014
Harley Davidson FXDWG Dyna Wide Glide Base 2015
Harley Davidson FXDWG Dyna Wide Glide Base 2016
Harley Davidson FXDWG Dyna Wide Glide Base 2017
Harley Davidson FXS Blackline Base 2011
Harley Davidson FXS Blackline Base 2012
Harley Davidson FXS Blackline Base 2013
Harley Davidson FXSBSE CVO Breakout Base 2013
Harley Davidson FXSBSE CVO Breakout Base 2014
Harley Davidson FXSTB Night Train Base 2007
Harley Davidson FXSTB Night Train Base 2008
Harley Davidson FXSTB Night Train Base 2009
Harley Davidson FXSTC Softail Custom Base 2007
Harley Davidson FXSTC Softail Custom Base 2008
Harley Davidson FXSTC Softail Custom Base 2009
Harley Davidson FXSTC Softail Custom Base 2010
Harley Davidson FXSTD Softail Deuce Base 2007
Harley Davidson FXSTSSE Screamin Eagle Softail Springer Base 2007
Harley Davidson FXSTSSE3 CVO Softail Springer Base 2009