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The radio antenna is a cheap ebay unit that is adequate but I wouldn't necessarily recommend.
The payback period of the solar system depends totally on the mpg change and current fuel prices but I put it at less than 150,000 miles if I gain a few mpg. Depending on how the unit works, I may also try using an electric motor to turn the air conditioning pump to eliminate those losses.
Last edited by VXmpgRacer; 05-24-2012 at 10:00 PM..
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