You are more than likely talking about the OEM (car makers) factory installed antennas or the newer retail Sirius radio antennas. The newer radios have antennas with no rat tails. Another antenna that is totally insode the vehicle is the Sirius SIGMA (Sirius interior glass mounted antenna). These are made for and sold by OEM's, but I bought one from one of many online OEM part retailers like www.mynissanparts.com .
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