I agree. Here in Detroit, I have this on my car with a Kenwood head unit. I didn't notice any change in reception. I was quite surprised. Also, I'm able to put my car cover on it without remove the antennae.
Surprising, very good to know thanks for your input it is much appreciated, Just picked up a 2000 GT for $2500.00, less than 200 miles on a rebuilt motor, heads were boiled, new clutch, new master and slave cylinders. Lowered, no sheet metal damage at all a few rust spots on the roof. Exhaust is in very good shape and sounds awesome, aftermarket but not sure which one yet. . Interior needs a little work no major rips. What gets me the most right now is the antenna is missing. The car runs great. Can't wait to pick it up tomorrow and start in on her.