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.

2012-2016 fits H-D FLD Switchback
1999-2016 fits H-D FLHR Road King
2007-2013 fits H-D FLHRC Road King Classic
1999-2006 fits H-D FLHRCI Road King Classic
2000-2006 fits H-D FLHRI Road King
2004-2007 fits H-D FLHRS Road King Custom
2002 fits H-D FLHRSEI Screamin fits Eagle Road King
2003 fits H-D FLHRSEI2 Screamin fits Eagle Road King 2
2004-2006 fits H-D FLHRSI Road King Custom
1999-2009 fits H-D FLHT Electra Glide Standard
1999-2005 fits H-D FLHTC Electra Glide Classic
2007-2013 fits H-D FLHTC Electra Glide Classic
1999-2006 fits H-D FLHTCI Electra Glide Classic
2004 fits H-D FLHTCSE Screamin fits Eagle Electra Glide
2005 fits H-D FLHTCSE2 Screamin fits Eagle Electra Glide 2
2007-2016 fits H-D FLHTCU Electra Glide Ultra Classic
1999-2006 fits H-D FLHTCUI Electra Glide Ultra Classic
2015-2016 fits H-D FLHTCUL Electra Glide Ultra Classic Low
2006 fits H-D FLHTCUSE Screamin fits Eagle Ultra Classic Electra Gli
2007 fits H-D FLHTCUSE2 Screamin fits Eagle Ultra Classic Electra Gl
2014-2016 fits H-D FLHTCUTG Tri Glide Ultra
2009-2013 fits H-D FLHTCUTG Tri Glide Ultra Classic
2003-2006 fits H-D FLHTI Electra Glide Standard
2010-2014 fits H-D FLHTK Electra Glide Ultra Limited
2015-2016 fits H-D FLHTK Ultra Limited
2015-2016 fits H-D FLHTKL Ultra Limited Low
2006-2016 fits H-D FLHX Street Glide
2006 fits H-D FLHXI Street Glide
2014-2016 fits H-D FLHXS Street Glide Special
2010-2011 fits H-D FLHXXX Street Glide Trike
2012-2017 fits H-D FLS Softail Slim
2017 fits H-D FLSS Softail Slim S
2006 fits H-D FLST Heritage Softail
1999-2017 fits H-D FLSTC H