I noticed a lots of folks have replaced the OEM stub antenna with the sharp fin using fractal antenna technology. I read from the manufacturer's web page that states that shark fin will perform within normal acceptable range. My biggest question is what is its true dB loss? The loss of radio sensitivity to me is not worthwhile just for cosmetic gain. I am not familiar with Lexus OEM radio brand and I am reluctant to to do any mod's which will degrade OEM spec's. Any comments from others?