Hastings #6164 moly-faced replacement rings for Factory pistons.
Standard bore is 3.4978in.
H-D#21924-83

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.

1994-1998 fits H-D FLHR Road King
1998 fits H-D FLHRCI Road King Classic
1996-1997 fits H-D FLHRI Road King
1986-1987 fits H-D FLHT Electra Glide Standard
1995-1998 fits H-D FLHT Electra Glide Standard
1984-1998 fits H-D FLHTC Electra Glide Classic
1996-1998 fits H-D FLHTCI Electra Glide Classic
1989-1997 fits H-D FLHTCU Electra Glide Ultra Classic
1995-1998 fits H-D FLHTCUI Electra Glide Ultra Classic
1986-1990 fits H-D FLST Heritage Softail
1988-1999 fits H-D FLSTC Heritage Softail Classic
1990-1999 fits H-D FLSTF Fat Boy
1993 fits H-D FLSTN Heritage Softail Nostalgia
1994-1996 fits H-D FLSTN Heritage Softail Special
1997-1999 fits H-D FLSTS Heritage Springer
1984-1991 fits H-D FLTC Tour Glide Classic
1989-1995 fits H-D FLTCU Tour Glide Ultra Classic
1996 fits H-D FLTCUI Tour Glide Ultra Classic
1998 fits H-D FLTR Road Glide
1998 fits H-D FLTRI Road Glide
1995-1998 fits H-D FXD Dyna Super Glide
1992 fits H-D FXDB-D Dyna Glide Daytona
1991 fits H-D FXDB-S Dyna Glide Sturgis
1992 fits H-D FXDC Super Glide Custom
1993-1998 fits H-D FXDL Dyna Low Rider
1994-1998 fits H-D FXDS-Conv Dyna Convertible
1993-1998 fits H-D FXDWG Dyna Wide Glide
1986-1994 fits H-D FXR Super Glide II
1985 fits H-D FXRC Low Rider Chrome
1987 fits H-D FXRC Low Rider Chrome
1986 fits H-D FXRD Sport Glide Grand Touring
1984 fits H-D FXRDG Disc Glide
1984-1992 fits H-D FXRS Low Glide
1990-1993 fits H-D FXRS-Conv Low Rider Sport Convertible
1986-1993 fits H-D FXRS-SP Low Rider Sport
1984-1992 fits H-D FXRT Sp