S&S Cycle 2007+ BT 3.937in x 4-3/8in Piston Set
Regular price
$449.14 USD
Regular price
-13%
$514.95 USD
Sale price
$449.14 USD
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Ready to install and hit the road!
All parts come with the essentials you need for a smooth fit and clear instructions. From performance upgrades to custom styling, unbox and get your ride ready with confidence!
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These big bore pistons work with the stock 4-3/8" stroke flywheels to convert any 2007-'16 HD® big twin engine from 96" or 103" to 107" displacement with 10.4:1 compression with stock heads. Stock cylinders may be bored to accomodate larger pistons, but we recommend S&S 3.927" bore cylinders which feature high strength alloyed cast iron liners. Pistons are compatible with stock rods with tapered wristpin ends. S&S® 3.927" bore pistons are machined to such close tolerances that it is not necessary to measure the piston. Just bore cylinders to nominal diameter +/- 0.0005" for correct clearance. Additionally, the low friction coating on the piston skirt makes taking measurements very difficult. 3.937" standard bore.
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2007-2016 | Harley-Davidson | FLHR Road King | Base |
| 2008-2013 | Harley-Davidson | FLHRC Road King Classic | Base |
| 2007 | Harley-Davidson | FLHRS Road King Custom | Base |
| 2007-2009 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 2009-2013 | Harley-Davidson | FLHTC Electra Glide Classic | Base |
| 2009-2016 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | Base |
| 2015-2016 | Harley-Davidson | FLHTCUL Electra Glide Ultra Classic Low | Base |
| 2009 | Harley-Davidson | FLHTCUSE4 CVO Ultra Classic Electra Glide | Base |
| 2010 | Harley-Davidson | FLHTCUSE5 CVO Ultra Classic Electra Glide | Base |
| 2009,2011-2014 | Harley-Davidson | FLHTCUTG Tri Glide Ultra | Base |
| 2009-2013 | Harley-Davidson | FLHTCUTG Tri Glide Ultra Classic | Base |
| 2010-2014 | Harley-Davidson | FLHTK Electra Glide Ultra Limited | Base |
| 2015-2017 | Harley-Davidson | FLHTKSE CVO Limited | Base |
| 2007-2016 | Harley-Davidson | FLHX Street Glide | Base |
| 2014,2016 | Harley-Davidson | FLHXS Street Glide Special | Base |
| 2015-2017 | Harley-Davidson | FLHXSE CVO Street Glide | Base |
| 2011 | Harley-Davidson | FLHXSE2 CVO Street Glide | Base |
| 2012 | Harley-Davidson | FLHXSE3 CVO Street Glide | Base |
| 2015-2016 | Harley-Davidson | FLRT Freewheeler | Base |
| 2012-2017 | Harley-Davidson | FLS Softail Slim | Base |
| 2016-2017 | Harley-Davidson | FLSS Softail Slim S | Base |
| 2007-2017 | Harley-Davidson | FLSTC Heritage Softail Classic | Base |
| 2007-2017 | Harley-Davidson | FLSTF Fat Boy | Base |
| 2010-2016 | Harley-Davidson | FLSTFB Fat Boy Lo | Base |
| 2016-2017 | Harley-Davidson | FLSTFBS Fat Boy S | Base |
| 2007-2014,2017 | Harley-Davidson | FLSTN Softail Deluxe | Base |
| 2014-2015 | Harley-Davidson | FLSTNSE CVO Softail Deluxe | Base |
| 2008-2011 | Harley-Davidson | FLSTSB Cross Bones | Base |
| 2007-2009 | Harley-Davidson | FLTR Road Glide | Base |
| 2009 | Harley-Davidson | FLTRSE3 CVO Road Glide | Base |
| 2011-2013,2016 | Harley-Davidson | FLTRU Road Glide Ultra | Base |
| 2015-2016 | Harley-Davidson | FLTRUSE CVO Road Glide Ultra | Base |
| 2015-2016 | Harley-Davidson | FLTRX Road Glide | Base |
| 2010-2013 | Harley-Davidson | FLTRX Road Glide Custom | Base |
| 2015-2016 | 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 |
| 2007-2010 | Harley-Davidson | FXD Dyna Super Glide | Base |
| 2007-2016 | Harley-Davidson | FXDB Street Bob | Base |
| 2007-2014 | Harley-Davidson | FXDC Super Glide Custom | Base |
| 2008-2017 | Harley-Davidson | FXDF Fat Bob | Base |
| 2009 | Harley-Davidson | FXDFSE CVO Dyna Fat Bob | Base |
| 2007-2009,2014-2017 | Harley-Davidson | FXDL Dyna Low Rider | Base |
| 2014-2017 | Harley-Davidson | FXDL Low Rider | Base |
| 2016-2017 | Harley-Davidson | FXDLS Low Rider S | Base |
| 2007-2008,2010-2017 | Harley-Davidson | FXDWG Dyna Wide Glide | Base |
| 2011-2013 | Harley-Davidson | FXS Blackline | Base |
| 2014-2017 | Harley-Davidson | FXSB Breakout | Base |
| 2013 | Harley-Davidson | FXSBSE CVO Breakout | Base |
| 2016-2017 | Harley-Davidson | FXSE CVO Pro Street Breakout | Base |
| 2007 | Harley-Davidson | FXST Softail Standard | Base |
| 2007-2009 | Harley-Davidson | FXSTB Night Train | Base |
| 2008,2010 | Harley-Davidson | FXSTC Softail Custom | Base |
| 2007 | Harley-Davidson | FXSTD Softail Deuce | Base |
| 2009 | Harley-Davidson | FXSTSSE3 CVO Softail Springer | Base |