The use of a 30A relay (not included) to achieve maximum volume and protect the stock electrical system is recommended. Mounts one horn in original location and one near left foot peg. Hardware kits include fuse, all wiring, mounting hardware and instructions (sold separately. Multi-application hardware kit.1984-1985 fits H-D FLH Electra Glide 1994-2020 fits H-D FLHR Road King 2007-2013 fits H-D FLHRC Road King Classic 1998-2006 fits H-D FLHRCI Road King Classic 1996-1997 fits H-D FLHRI Road King 2000-2006 fits H-D FLHRI Road King 2004-2007 fits H-D FLHRS Road King Custom 2004-2006 fits H-D FLHRSI Road King Custom 2017-2020 fits H-D FLHRXS Road King Special 1984 fits H-D FLHS Electra Glide Sport 1987-1993 fits H-D FLHS Electra Glide Sport 1986-1987 fits H-D FLHT Electra Glide Standard 1995-2009 fits H-D FLHT Electra Glide Standard 2019-2020 fits H-D FLHT Electra Glide Standard 1984-2005 fits H-D FLHTC Electra Glide Classic 2007-2013 fits H-D FLHTC Electra Glide Classic 1996-2006 fits H-D FLHTCI Electra Glide Classic 1989-1997 fits H-D FLHTCU Electra Glide Ultra Classic 2007-2019 fits H-D FLHTCU Electra Glide Ultra Classic 1995-2006 fits H-D FLHTCUI Electra Glide Ultra Classic 2015-2016 fits H-D FLHTCUL Electra Glide Ultra Classic Low 2014-2020 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 2015-2020 fits H-D FLHTK Ultra Limited 2015-2019 fits H-D FLHTKL Ultra Limited Low 1984-1985 fits H-D FLHX Electra Glide Special 2006-2020 fits H-D FLHX Street Glide 2006 fits H-D FLHXI Street Glide 2014-2020 fits H-D FLHXS Street Glide Special 2010-2011 fits H-D FLHXXX Street Glide Trike 2015-2020 fits H-D FLRT Freewheeler 1984-1991 fits H-D FLTC Tour Glide Classic 1989-1995 fits H-D FL