KB Performance forged piston kit with a domed piston head shape. Pistons are forged from 4032 aluminum alloy and feature coated skirts. Offset pin design for quiet operation.
- Standard bore: 3.875 in.
- Stroke length: 4.375 in.
- Compression ratio: 10.5:1
- Displacement: 103ci
- Kit includes two pistons, wrist pins, spiral-lock pin clips, and Hastings moly rings
- Piston pin lock rings available separately; use lock rings MFG #PRJ-100 (package of 4)
- Replacement rings available separately
Fits the following:
- Harley-Davidson Blackline FXS: 2011-2013
- Harley-Davidson Breakout FXSB: 2013-2017
- Harley-Davidson Cross Bones FLSTSB: 2008-2011
- Harley-Davidson Dyna Fat Bob FXDF: 2010
- Harley-Davidson Dyna Low Rider FXDL: 2007-2009
- Harley-Davidson Dyna Super Glide FXD: 2007-2010
- Harley-Davidson Dyna Wide Glide FXDWG: 2007-2008, 2010-2017
- Harley-Davidson Electra Glide Classic FLHTC: 2007-2013
- Harley-Davidson Electra Glide Low Ultra Classic FLHTCUL: 2015-2016
- Harley-Davidson Electra Glide Ultra Classic FLHTCU: 2007-2016
- Harley-Davidson Electra Glide Ultra Limited FLHTK: 2010-2014
- Harley-Davidson FLD Switchback: 2012-2016
- Harley-Davidson FLHT Electra Glide Standard: 2007-2009
- Harley-Davidson FLHTCUTG Tri Glide Ultra: 2015
- Harley-Davidson FLHTKL Ultra Limited Low: 2015
- Harley-Davidson FLSTFBS Fat Boy S: 2016
- Harley-Davidson FXDB Street Bob: 2007-2017
- Harley-Davidson FXDC Super Glide Custom: 2007-2014
- Harley-Davidson FXDF Fat Bob: 2008-2009, 2011-2017
- Harley-Davidson FXDL Low Rider: 2015-2017
- Harley-Davidson Fat Boy FLSTF: 2007-2017
- Harley-Davidson Fat Boy Lo FLSTFB: 2010-2016
- Harley-Davidson Freewheeler FLRT: 2015-2016
- Harley-Davidson Heritage Softail Classic FLSTC: 2007-2017
- Harley-Davidson Night Train FXSTB: 2007-2009
- Harley-Davidson Road Glide Custom FLTRX: 2010-2013
- Harley-Davidson Road Glide FLTR: 2007-2009
- Harley-Davidson Road Glide FLTRX: 2015-2016
- Harley-Davidson Road Glide Special FLTRXS: 2015-2016
- Harley-Davidson Road Glide Ultra FLTRU: 2011-2013, 2016
- Harley-Davidson Road King Classic FLHRC: 2007-2013
- Harley-Davidson Road King Custom FLHRS: 2007
- Harley-Davidson Road King FLHR: 2007-2016
- Harley-Davidson Road King Special FLHRXS: 2017
- Harley-Davidson Rocker C FXCWC: 2008-2011
- Harley-Davidson Rocker FXCW: 2008-2009
- Harley-Davidson Softail Custom FXSTC: 2007-2010
- Harley-Davidson Softail Deluxe FLSTN: 2007-2017
- Harley-Davidson Softail Deuce FXSTD: 2007
- Harley-Davidson Softail Slim FLS: 2012-2017
- + 10 more - see the compatibility chart