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Old 06-26-2015, 11:58 AM   #12 (permalink)
wanker
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A tune could add fuel efficiency, if you specifically tuned your car to improve your MPG.

Otherwise, a lighter exhaust could theoretically help (and any other mod to lighten your car), but that's about it.

Last edited by wanker; 06-26-2015 at 01:44 PM.
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