High Compression Piston Kit — 4.000" bore, 110" displacement, 10.6:1 compression

S&S CYCLE High Compression Piston Kit — 4.000" bore, 110" displacement, 10.6:1 compression – 07-17 Dyna, 07-15 Touring, 07-17 CVO, 10-15 Trike, 07-17 Softail

S&S CYCLE
0910-3979
920-0114
High compression piston kit with 12.5cc raised dome, 1.0985" deck height and .927" wristpin; not for twin cooled or '17 touring models.
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High Compression Piston Kit designed for improved power and throttle response. 🔧🔥

  • Deck height is 1.0985" for precise piston-to-head clearance.
  • Wristpin diameter is .927" for reliable conrod fitment.
  • Piston features a 12.5cc raised dome to increase compression and combustion efficiency.
  • Not for twin cooled or '17 touring models.

Precision-machined for consistent ring seal and long service life. Suitable for professional installation.

: 0910-3979
In Stock

Data sheet

Brand
S&S CYCLE
Bore - Oversize
Standard
Bore Size
4,000"
Compression Ratio
10.6:1
Harley Family
CVO
Dyna
Softail
Touring
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 2012
Harley Davidson Dyna Switchback Dyna 2013
Harley Davidson Dyna Switchback Dyna 2014
Harley Davidson Dyna Switchback Dyna 2015
Harley Davidson Road King Touring 2007
Harley Davidson Road King Touring 2008
Harley Davidson Road King Touring 2009
Harley Davidson Road King Touring 2010
Harley Davidson Road King Touring 2011
Harley Davidson Road King Touring 2008
Harley Davidson Road King Touring 2009
Harley Davidson Road King Touring 2010
Harley Davidson Road King Touring 2011
Harley Davidson Road King Touring 2012
Harley Davidson Road King Touring 2013
Harley Davidson Road King Touring 2014
Harley Davidson Road King Touring 2015
Harley Davidson Road King Touring 2012
Harley Davidson Road King Touring 2013
Harley Davidson Road King Touring 2014
Harley Davidson Road King Touring 2015
Harley Davidson Road King Classic Touring 2007
Harley Davidson Road King Classic Touring 2008
Harley Davidson Road King Classic Touring 2009
Harley Davidson Road King Classic Touring 2010
Harley Davidson Road King Classic Touring 2008
Harley Davidson Road King Classic Touring 2009
Harley Davidson Road King Classic Touring 2010
Harley Davidson Road King Classic Touring 2011
Harley Davidson Road King Classic Touring 2011
Harley Davidson Road King Classic Touring 2012
Harley Davidson Road King Classic Touring 2013
Harley Davidson Road King Classic Touring 2014
Harley Davidson Road King Classic Touring 2015
Harley Davidson Road King Custom Touring 2007
Harley Davidson Road King Screamin Eagle CVO 2007 Standard
Harley Davidson Road King Screamin Eagle CVO 2008 Standard
Harley Davidson Road King CVO 110th Anniversary CVO 2013 Standard
Harley Davidson Road King CVO CVO 2014 Standard
Harley Davidson Electra Glide Touring 2007
Harley Davidson Electra Glide Touring 2008
Harley Davidson Electra Glide Touring 2009
Harley Davidson Electra Glide Touring 2008
Harley Davidson Electra Glide Touring 2009
Harley Davidson Electra Glide Classic Touring 2007
Harley Davidson Electra Glide Classic Touring 2008
Harley Davidson Electra Glide Classic Touring 2009
Harley Davidson Electra Glide Classic Touring 2010
Harley Davidson Electra Glide Classic Touring 2011
Harley Davidson Electra Glide Classic Touring 2009
Harley Davidson Electra Glide Classic Touring 2010
Harley Davidson Electra Glide Classic Touring 2011
Harley Davidson Electra Glide Classic Touring 2012
Harley Davidson Electra Glide Classic Touring 2013
Harley Davidson Electra Glide Classic Touring 2011
Harley Davidson Electra Glide Classic Touring 2012
Harley Davidson Electra Glide Classic Touring 2013
Harley Davidson Electra Glide Ultra Classic Touring 2007
Harley Davidson Electra Glide Ultra Classic Touring 2009
Harley Davidson Electra Glide Ultra Classic Touring 2010
Harley Davidson Electra Glide Ultra Classic Touring 2011
Harley Davidson Electra Glide Ultra Classic Touring 2008
Harley Davidson Electra Glide Ultra Classic Touring 2009
Harley Davidson Electra Glide Ultra Classic Touring 2010
Harley Davidson Electra Glide Ultra Classic Touring 2011
Harley Davidson Electra Glide Ultra Classic Touring 2012
Harley Davidson Electra Glide Ultra Classic Touring 2013
Harley Davidson Electra Glide Ultra Classic Touring 2012
Harley Davidson Electra Glide Ultra Classic Touring 2013
Harley Davidson Electra Glide Ultra Classic Touring 2014
Harley Davidson Electra Glide Ultra Classic Touring 2015
Harley Davidson Electra Glide Ultra Classic Low Touring 2015
Harley Davidson Electra Glide Ultra Classic Screamin Eagle CVO 2007 Standard
Harley Davidson Electra Glide Ultra Classic Screamin Eagle CVO 2008 Standard
Harley Davidson Electra Glide Ultra Classic CVO CVO 2009 Standard
Harley Davidson Electra Glide Ultra Classic CVO CVO 2010 Standard
Harley Davidson Electra Glide Ultra Classic CVO CVO 2011 Standard
Harley Davidson Electra Glide Ultra Classic CVO CVO 2012 Standard
Harley Davidson Electra Glide Ultra Classic CVO 110th Anniversary CVO 2013 Standard
Harley Davidson Trike Tri Glide Ultra Classic Trike 2010
Harley Davidson Trike Tri Glide Ultra Classic Trike 2011
Harley Davidson Trike Tri Glide Ultra Classic Trike 2012
Harley Davidson Trike Tri Glide Ultra Classic 110th Anniversary Trike 2013
Harley Davidson Trike Tri Glide Ultra Classic Trike 2014
Harley Davidson Trike Tri Glide Ultra Classic Trike 2015
Harley Davidson Electra Glide Ultra Limited Touring 2010
Harley Davidson Electra Glide Ultra Limited Touring 2011
Harley Davidson Electra Glide Ultra Limited Touring 2011
Harley Davidson Electra Glide Ultra Limited Touring 2012
Harley Davidson Electra Glide Ultra Limited Touring 2013
Harley Davidson Electra Glide Ultra Limited Touring 2014
Harley Davidson Electra Glide Ultra Limited Touring 2015
Harley Davidson Electra Glide Ultra Limited Low Touring 2015
Harley Davidson Electra Glide Ultra Limited CVO CVO 2014 Standard
Harley Davidson Electra Glide Ultra Limited CVO CVO 2015 Standard
Harley Davidson Electra Glide Ultra Limited CVO CVO 2016 Standard
Harley Davidson Street Glide Touring 2007
Harley Davidson Street Glide Touring 2008
Harley Davidson Street Glide Touring 2009
Harley Davidson Street Glide Touring 2010
Harley Davidson Street Glide Touring 2011
Harley Davidson Street Glide Touring 2008
Harley Davidson Street Glide Touring 2009
Harley Davidson Street Glide Touring 2010
Harley Davidson Street Glide Touring 2011
Harley Davidson Street Glide Touring 2011
Harley Davidson Street Glide Touring 2012
Harley Davidson Street Glide Touring 2013
Harley Davidson Street Glide Touring 2014
Harley Davidson Street Glide Touring 2015
Harley Davidson Street Glide Touring 2011
Harley Davidson Street Glide Touring 2012
Harley Davidson Street Glide Touring 2013
Harley Davidson Street Glide Touring 2014
Harley Davidson Street Glide Touring 2015
Harley Davidson Street Glide Special Touring 2014
Harley Davidson Street Glide Special Touring 2015
Harley Davidson Street Glide CVO CVO 2010 Standard
Harley Davidson Street Glide CVO CVO 2015 Standard
Harley Davidson Street Glide CVO CVO 2016 Standard
Harley Davidson Street Glide CVO CVO 2011 Standard
Harley Davidson Street Glide CVO CVO 2012 Standard
Harley Davidson Trike Street Glide Touring 2010
Harley Davidson Trike Street Glide Touring 2011
Harley Davidson Freewheeler Trike 2015
Harley Davidson Softail Slim Softail 2012
Harley Davidson Softail Slim Softail 2013
Harley Davidson Softail Slim Softail 2014
Harley Davidson Softail Slim Softail 2015
Harley Davidson Softail Slim Softail 2012
Harley Davidson Softail Slim Softail 2013
Harley Davidson Softail Slim Softail 2014
Harley Davidson Softail Slim Softail 2015
Harley Davidson Softail Slim S Softail 2016 Standard
Harley Davidson Softail Slim S Softail 2017 Standard
Harley Davidson Heritage Softail Classic Softail 2007
Harley Davidson Heritage Softail Classic Softail 2008
Harley Davidson Heritage Softail Classic Softail 2009
Harley Davidson Heritage Softail Classic Softail 2010
Harley Davidson Heritage Softail Classic Softail 2011
Harley Davidson Heritage Softail Classic Softail 2011
Harley Davidson Heritage Softail Classic Softail 2012
Harley Davidson Heritage Softail Classic Softail 2013
Harley Davidson Heritage Softail Classic Softail 2012
Harley Davidson Heritage Softail Classic Softail 2013
Harley Davidson Heritage Softail Classic Softail 2014
Harley Davidson Heritage Softail Classic Softail 2015
Harley Davidson Fat Boy Softail 2007
Harley Davidson Fat Boy Softail 2008
Harley Davidson Fat Boy Softail 2009
Harley Davidson Fat Boy Softail 2010
Harley Davidson Fat Boy Softail 2011
Harley Davidson Fat Boy Softail 2011
Harley Davidson Fat Boy Softail 2012
Harley Davidson Fat Boy Softail 2013
Harley Davidson Fat Boy Softail 2014
Harley Davidson Fat Boy Softail 2012
Harley Davidson Fat Boy Softail 2013
Harley Davidson Fat Boy Softail 2014
Harley Davidson Fat Boy Softail 2015
Harley Davidson Fat Boy Special Softail 2010
Harley Davidson Fat Boy Lo Softail 2011
Harley Davidson Fat Boy Special Softail 2011
Harley Davidson Fat Boy Lo Softail 2012
Harley Davidson Fat Boy Lo Softail 2013
Harley Davidson Fat Boy Special Softail 2012
Harley Davidson Fat Boy Special Softail 2013
Harley Davidson Fat Boy Special Softail 2014
Harley Davidson Fat Boy Special Softail 2015
Harley Davidson Fat Boy S Softail 2016 Standard
Harley Davidson Fat Boy S Softail 2017 Standard
Harley Davidson Softail Deluxe Softail 2007
Harley Davidson Softail Deluxe Softail 2008
Harley Davidson Softail Deluxe Softail 2009
Harley Davidson Softail Deluxe Softail 2010
Harley Davidson Softail Deluxe Softail 2011
Harley Davidson Softail Deluxe Softail 2011
Harley Davidson Softail Deluxe Softail 2012
Harley Davidson Softail Deluxe Softail 2013
Harley Davidson Softail Deluxe Softail 2012
Harley Davidson Softail Deluxe Softail 2013
Harley Davidson Softail Deluxe Softail 2014
Harley Davidson Softail Deluxe Softail 2015
Harley Davidson Softail Deluxe CVO CVO 2014 Standard
Harley Davidson Softail Deluxe CVO CVO 2015 Standard
Harley Davidson Cross Bones Softail 2008
Harley Davidson Cross Bones Softail 2009
Harley Davidson Cross Bones Softail 2010
Harley Davidson Cross Bones Softail 2011
Harley Davidson Softail Springer Classic Softail 2007
Harley Davidson Softail Convertible CVO CVO 2010 Standard
Harley Davidson Softail Convertible CVO CVO 2011 Standard
Harley Davidson Softail Convertible CVO CVO 2011 Standard
Harley Davidson Softail Convertible CVO CVO 2012 Standard
Harley Davidson Road Glide Touring 2007
Harley Davidson Road Glide Touring 2008
Harley Davidson Road Glide Touring 2009
Harley Davidson Road Glide Touring 2010
Harley Davidson Road Glide Touring 2009
Harley Davidson Road Glide Touring 2010
Harley Davidson Road Glide CVO CVO 2009 Standard
Harley Davidson Road Glide Ultra Touring 2011
Harley Davidson Road Glide Ultra Touring 2011
Harley Davidson Road Glide Ultra Touring 2012
Harley Davidson Road Glide Ultra Touring 2013
Harley Davidson Road Glide Ultra CVO CVO 2011 Standard
Harley Davidson Road Glide Ultra CVO CVO 2015 Standard
Harley Davidson Road Glide Ultra CVO CVO 2016 Standard
Harley Davidson Road Glide Custom Touring 2010
Harley Davidson Road Glide Custom Touring 2011
Harley Davidson Road Glide Custom Touring 2010
Harley Davidson Road Glide Custom Touring 2011
Harley Davidson Road Glide Custom Touring 2011
Harley Davidson Road Glide Custom Touring 2012
Harley Davidson Road Glide Custom Touring 2013
Harley Davidson Road Glide Touring 2015
Harley Davidson Road Glide Custom Touring 2011
Harley Davidson Road Glide Custom Touring 2012
Harley Davidson Road Glide Custom Touring 2013
Harley Davidson Road Glide Touring 2015
Harley Davidson Road Glide Special Touring 2015
Harley Davidson Road Glide Custom CVO CVO 2012 Standard
Harley Davidson Road Glide Custom CVO CVO 2013 Standard
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 Super Glide Dyna 2007
Harley Davidson Dyna Super Glide Dyna 2008
Harley Davidson Dyna Super Glide Dyna 2009
Harley Davidson Dyna Super Glide Dyna 2010
Harley Davidson Dyna Street Bob Dyna 2007
Harley Davidson Dyna Street Bob Dyna 2008
Harley Davidson Dyna Street Bob Dyna 2009
Harley Davidson Dyna Street Bob Dyna 2010
Harley Davidson Dyna Street Bob Dyna 2011
Harley Davidson Dyna Street Bob Dyna 2012
Harley Davidson Dyna Street Bob Dyna 2013
Harley Davidson Dyna Street Bob Dyna 2012
Harley Davidson Dyna Street Bob Dyna 2013
Harley Davidson Dyna Street Bob Dyna 2014
Harley Davidson Dyna Street Bob Dyna 2015
Harley Davidson Dyna Street Bob Dyna 2014
Harley Davidson Dyna Street Bob Dyna 2015
Harley Davidson Dyna Super Glide Custom Dyna 2007
Harley Davidson Dyna Super Glide Custom Dyna 2008
Harley Davidson Dyna Super Glide Custom Dyna 2009
Harley Davidson Dyna Super Glide Custom Dyna 2010
Harley Davidson Dyna Super Glide Custom Dyna 2011
Harley Davidson Dyna Super Glide Custom Dyna 2012
Harley Davidson Dyna Super Glide Custom Dyna 2013
Harley Davidson Dyna Super Glide Custom Dyna 2012
Harley Davidson Dyna Super Glide Custom Dyna 2013
Harley Davidson Dyna Super Glide Custom Dyna 2014
Harley Davidson Dyna Super Glide Custom Dyna 2014
Harley Davidson Dyna Fat Bob Dyna 2008
Harley Davidson Dyna Fat Bob Dyna 2009
Harley Davidson Dyna Fat Bob Dyna 2010
Harley Davidson Dyna Fat Bob Dyna 2011
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2013
Harley Davidson Dyna Fat Bob Dyna 2014
Harley Davidson Dyna Fat Bob Dyna 2015
Harley Davidson Dyna Fat Bob Dyna 2012
Harley Davidson Dyna Fat Bob Dyna 2013
Harley Davidson Dyna Fat Bob Dyna 2014
Harley Davidson Dyna Fat Bob Dyna 2015
Harley Davidson Dyna Fat Bob CVO CVO 2009 Standard
Harley Davidson Dyna Fat Bob CVO CVO 2010 Standard
Harley Davidson Dyna Low Rider Dyna 2007
Harley Davidson Dyna Low Rider Dyna 2008
Harley Davidson Dyna Low Rider Dyna 2009
Harley Davidson Dyna Low Rider Dyna 2014
Harley Davidson Dyna Low Rider Dyna 2015
Harley Davidson Dyna Low Rider Dyna 2014
Harley Davidson Dyna Low Rider Dyna 2015
Harley Davidson Dyna Low Rider S Dyna 2016 Standard
Harley Davidson Dyna Low Rider S Dyna 2017 Standard
Harley Davidson Dyna Screamin Eagle CVO 2007 Standard
Harley Davidson Dyna Screamin Eagle CVO 2008 Standard
Harley Davidson Dyna Wide Glide Dyna 2007
Harley Davidson Dyna Wide Glide 105th Anniversary Dyna 2008
Harley Davidson Dyna Wide Glide Dyna 2010
Harley Davidson Dyna Wide Glide Dyna 2011
Harley Davidson Dyna Wide Glide Dyna 2012
Harley Davidson Dyna Wide Glide Dyna 2012
Harley Davidson Dyna Wide Glide Dyna 2013
Harley Davidson Dyna Wide Glide Dyna 2012
Harley Davidson Dyna Wide Glide Dyna 2013
Harley Davidson Dyna Wide Glide Dyna 2014
Harley Davidson Dyna Wide Glide Dyna 2015
Harley Davidson Blackline Softail 2011
Harley Davidson Blackline Softail 2011
Harley Davidson Blackline Softail 2012
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 2013
Harley Davidson Breakout Softail 2014
Harley Davidson Breakout Softail 2015
Harley Davidson Breakout CVO CVO 2013 Standard
Harley Davidson Breakout CVO CVO 2014 Standard
Harley Davidson Pro Street Breakout CVO CVO 2016 Standard
Harley Davidson Pro Street Breakout CVO CVO 2017 Standard
Harley Davidson Softail Softail 2007
Harley Davidson Softail Night Train Softail 2007
Harley Davidson Softail Night Train Softail 2008
Harley Davidson Softail Night Train Softail 2009
Harley Davidson Softail Custom Softail 2007
Harley Davidson Softail Custom Softail 2008
Harley Davidson Softail Custom Softail 2009
Harley Davidson Softail Custom Softail 2010
Harley Davidson Softail Deuce Softail 2007
Harley Davidson Softail Springer Screamin Eagle CVO 2007 Standard
Harley Davidson Softail Springer Screamin Eagle CVO 2008 Standard
Harley Davidson Softail Springer CVO CVO 2009 Standard