Big Bore Cylinder Kit — 3.937 in bore, 107 cu in, 4.375 in stroke, Silver

S&S CYCLE Big Bore Cylinder Kit — 3.937 in bore, 107 cu in, 4.375 in stroke, Silver – 12-17 Dyna, 09, 13-16 Trike, 07-17 Softail, 07-15 CVO

S&S CYCLE
0931-0535
910-0480
Big Bore cylinder kit for compatible V-twin engines. Includes pistons, rings and gaskets; easy swap installation in most applications. Made in the USA. Professional assembly and clearance checks required. Fits Twin Cooled motors; not for use with certain 79 cc heads.
Hurry! only 2 items left in stock.
€1,586.46
€1,911.72
Save €325.26
VAT included
local_shipping In stock, ships in 20-25 days

Add to Compare
Add to Wishlist

The Big Bore Cylinder Kit delivers substantial performance improvements for compatible V-twin engines. 🔧🔥

Designed for excellent results with stock cylinder heads, this kit installs easily without boring or splitting existing cases in most applications — just swap the cylinders where indicated. ⚙️

  • Premium cast construction with cast-in liners for long life.
  • Includes cylinders, pistons, rings and gaskets for a complete refresh.
  • Made in the USA and intended for experienced technicians; verify all clearances and assembly specifications during installation.

This kit fits Twin Cooled motors and is not for use with certain 79 cc heads; consult a qualified builder before beginning your project. 🇺🇸

: 0931-0535
In Stock

Data sheet

Units
Kit
Color/Finish
Silver
Style
Big Bore
Brand
S&S CYCLE
Bore Size
3,937"
Displacement
107"
Stroke Length
4,375"
Compression Ratio
9.9:1
Material
Aluminum
Harley Family
CVO
Dyna
Softail
Trike

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Dyna Switchback Dyna 2012
Harley Davidson Dyna Switchback Dyna 2013
Harley Davidson Dyna Switchback Dyna 2015
Harley Davidson Dyna Switchback Dyna 2016
Harley Davidson Trike Tri Glide Ultra Classic Trike 2009
Harley Davidson Trike Tri Glide Ultra Classic Trike 2013
Harley Davidson Trike Tri Glide Ultra Classic Trike 2014
Harley Davidson Trike Tri Glide Ultra Classic Trike 2015
Harley Davidson Trike Tri Glide Ultra Classic Trike 2016
Harley Davidson Freewheeler Trike 2015
Harley Davidson Freewheeler Trike 2016
Harley Davidson Softail Slim Softail 2016
Harley Davidson Softail Slim Softail 2017
Harley Davidson Softail Slim Softail 2016
Harley Davidson Heritage Softail Classic Softail 2016
Harley Davidson Heritage Softail Classic Softail 2017
Harley Davidson Fat Boy Softail 2016
Harley Davidson Fat Boy Softail 2017
Harley Davidson Fat Boy Special Softail 2012
Harley Davidson Fat Boy Special Softail 2015
Harley Davidson Fat Boy Special Softail 2016
Harley Davidson Fat Boy Special Softail 2017
Harley Davidson Softail Deluxe CVO CVO 2014
Harley Davidson Softail Deluxe CVO CVO 2015
Harley Davidson Cross Bones Springer Softail 2010
Harley Davidson Softail Convertible CVO CVO 2010
Harley Davidson Softail Convertible CVO CVO 2011
Harley Davidson Softail Convertible CVO CVO 2011
Harley Davidson Softail Convertible CVO CVO 2012
Harley Davidson Rocker Softail 2008
Harley Davidson Rocker Softail 2009
Harley Davidson Rocker C Softail 2008
Harley Davidson Rocker C Softail 2009
Harley Davidson Rocker C Softail 2010
Harley Davidson Rocker C Softail 2011
Harley Davidson Rocker C Softail 2011
Harley Davidson Dyna Street Bob Dyna 2016
Harley Davidson Dyna Street Bob Dyna 2017
Harley Davidson Dyna Street Bob Limited Dyna 2013
Harley Davidson Dyna Street Bob Limited Dyna 2013
Harley Davidson Dyna Street Bob Limited Dyna 2013
Harley Davidson Dyna Street Bob Limited Dyna 2013
Harley Davidson Dyna Street Bob Special Dyna 2014
Harley Davidson Dyna Street Bob Special Dyna 2015
Harley Davidson Dyna Street Bob Special Dyna 2014
Harley Davidson Dyna Street Bob Special Dyna 2015
Harley Davidson Dyna Street Bob Limited Dyna 2016
Harley Davidson Dyna Street Bob Limited Dyna 2016
Harley Davidson Dyna Street Bob Factory Custom Dyna 2013
Harley Davidson Dyna Street Bob Factory Custom Dyna 2014
Harley Davidson Dyna Street Bob Factory Custom Dyna 2015
Harley Davidson Dyna Street Bob Factory Custom Dyna 2016
Harley Davidson Dyna Street Bob Factory Custom Dyna 2013
Harley Davidson Dyna Street Bob Factory Custom Dyna 2014
Harley Davidson Dyna Street Bob Factory Custom Dyna 2015
Harley Davidson Dyna Street Bob Factory Custom Dyna 2016
Harley Davidson Dyna Fat Bob Dyna 2014
Harley Davidson Dyna Fat Bob Dyna 2015
Harley Davidson Dyna Fat Bob Dyna 2016
Harley Davidson Dyna Fat Bob Dyna 2017
Harley Davidson Dyna Fat Bob Dyna 2015
Harley Davidson Dyna Fat Bob Dyna 2017
Harley Davidson Dyna Fat Bob CVO CVO 2009
Harley Davidson Dyna Fat Bob CVO CVO 2010
Harley Davidson Dyna Low Rider Dyna 2015
Harley Davidson Dyna Low Rider Dyna 2016
Harley Davidson Dyna Low Rider Dyna 2017
Harley Davidson Dyna Low Rider Dyna 2014
Harley Davidson Dyna Low Rider Dyna 2015
Harley Davidson Dyna Low Rider Dyna 2016
Harley Davidson Dyna Screamin Eagle CVO 2007
Harley Davidson Dyna Screamin Eagle CVO 2008
Harley Davidson Dyna Wide Glide Dyna 2016
Harley Davidson Dyna Wide Glide Dyna 2017
Harley Davidson Blackline Softail 2011
Harley Davidson Blackline Softail 2011
Harley Davidson Blackline Softail 2012
Harley Davidson Blackline Softail 2013
Harley Davidson Blackline Softail 2012
Harley Davidson Blackline Softail 2013
Harley Davidson Breakout Softail 2013
Harley Davidson Breakout Softail 2014
Harley Davidson Breakout Softail 2015
Harley Davidson Breakout Softail 2016
Harley Davidson Breakout Softail 2017
Harley Davidson Breakout CVO CVO 2013
Harley Davidson Breakout CVO CVO 2014
Harley Davidson Softail Standard Softail 2008
Harley Davidson Softail Standard Softail 2009
Harley Davidson Softail Standard Softail 2010
Harley Davidson Softail Standard Softail 2011
Harley Davidson Softail Standard Softail 2012
Harley Davidson Softail Standard Softail 2013
Harley Davidson Softail Standard Softail 2014
Harley Davidson Softail Standard Softail 2015
Harley Davidson Softail Deuce Softail 2007
Harley Davidson Softail Springer Screamin Eagle CVO 2007
Harley Davidson Softail Springer Screamin Eagle CVO 2008
Harley Davidson Softail Springer CVO CVO 2009