The MFJ-1432 mobile antenna is a high gain, dual-band mobile antenna. It is 62.5" tall and provides 5 db gain on 2 meters and 7.6 db gain on 70 cm. It can handle 150 watts of power.
I added this antenna to my car to replace a broken antenna. The performance of this antenna is top notch, easily outdoing the previous antenna which costs more than double of the MFJ. I regularly talk on repeaters over 40 miles while mobile.
Here are the reviews for the MFJ-1432 on e-ham: Reviews