Obviously the higher the antenna the better it will work but gone are the days where a whip antenna for CB use is mounted to the side of a car or truck. epode are in to cool looks and smooth lines so smaller is better. If you are currently experiencing bad reception and the thought of an antenna upgrade has entered your mind we have the direction you should travel. A Google search will make short work of finding the right item. It is really that easy. If you want a smaller fin type antennae try calling a BMW dealership and ask them if they have any in stock. The web search should show you dimensions, attachment points and colors. In addition look for a money back guarantee so if you purchase and do a test and the results are less then spectacular you will have room to fall back on.