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With all of the time and money we spend trying to free up our exhaust systems...why on earth would you want to shove a cork in your tailpipe? Does it work? I dont know and dont really give a damn. My Boxster was not a purchase to save money on gas, even though it does much better than my SUV! I think this is the point in my post when I am supposed to mention something about a couple pennies.
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