Harley Davidson Harley Davidson Steetglide 2014-2015 Factory Stereo - Radio Antenna Adapter Plug $5.95 Harley Davidson Roadglide 2015 Factory Stereo to Radio Antenna Adapter Plug $5.95 Metra 70-9800 1998-2013 Harley Davidson Aftermarket Radio Stereo Harness $24.95