Shorty AM/FM Antenna #76388-08 $29.95
I put this one on the bike. It didn't make my radio work any better, but I bought it because I didn't like the loooooooooong whip it came with. It works better under the bike cover.
I got both for Christmas. They look great on the bike and I no longer have to worry about height when I enter the garage or raise the bike on the lift.
While I have not tested them, a friend installed them on his back in Sept. They both work well, and he does not notice any difference in the CB.
I've been using AntennaX shortys for 2 years but I had some free HD Christmas money left over so I picked up the nice HD shortys last week. I think they look much better than the AntennaX ones.