J&M Audio External Antenna Upgrade for 1990-2008 Harley-Davidson Touring models with Radio - HBSA-8908 If you are looking for THE Best performing shorty antenna upgrade look no further than J&M This new shorty antenna model from J&M comes out of the packaged pre-tuned for all AM/FM CB & WB frequencies, so that you dont need to worry about which side of the tail trunk or rear fender to mount them on Installation is a snap as you simply unscrew the stock Harley antenna and screw on the new J&M shorty