Weight reduction will come in handy more at lower speeds than it will at high speeds... That's when aerodynamics really plays it's role. At the speeds you drive, you should see some decent gains from a boat-tail, which should (as other's said) weigh much less than the 500lbs you have removed. When it comes to aero mods, if you go by the aero template it's hard to go wrong.
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Best Tank = 42.72 mpg (in the 94 Del Sol)
CR-Z Current Mods:
Max Sidewall PSI
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