Aerodynamic Auto Aids - Darin Cosgrove's ‘Boat Tail’ Mod Boosts Fuel EconomyWhy didn’t anybody think of putting a boat tail on a car before? Darin Cosgrove has, and his 1998 Pontiac Firefly, known as a Geo Metro in the states, now gets an astounding 64 mpg. Cosgrove built the… |
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