Hastings #2M4941.
Bore is 98.43mm or 3.875in.

Available in standard and oversize versions. Feature a moly top ring. Reverse torsional taper face second ring and easy spiral on three-piece oil rings. NOTE: Each PART # includes enough rings for two pistons except where noted.

2013 fits H-D FLHRSE5 CVO Road King
2014 fits H-D FLHRSE6 CVO Road King
2009 fits H-D FLHTCUSE4 CVO Ultra Classic Electra Glide
2010 fits H-D FLHTCUSE5 CVO Ultra Classic Electra Glide
2011 fits H-D FLHTCUSE6 CVO Ultra Classic Electra Glide
2012 fits H-D FLHTCUSE7 CVO Ultra Classic Electra Glide
2013 fits H-D FLHTCUSE8 CVO Ultra Classic Electra Glide
2014-2015 fits H-D FLSTNSE CVO Softail Deluxe
2010 fits H-D FLSTSE CVO Softail Convertible
2011 fits H-D FLSTSE2 CVO Softail Convertible
2012 fits H-D FLSTSE3 CVO Softail Convertible
2009 fits H-D FLTRSE3 CVO Road Glide
2011 fits H-D FLTRUSE CVO Road Glide Ultra
2015-2016 fits H-D FLTRUSE CVO Road Glide Ultra
2012 fits H-D FLTRXSE CVO Road Glide Custom
2013 fits H-D FLTRXSE2 CVO Road Glide Custom
2009 fits H-D FXDFSE CVO Dyna Fat Bob
2010 fits H-D FXDFSE2 CVO Dyna Fat Bob
2017 fits H-D FXSE CVO Pro Street Breakout
2009 fits H-D FXSTSSE3 CVO Softail Springer