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Q: Will the Gurney flap hurt straight-line speed or efficiency?

The drag penalty is small relative to the downforce gained; that trade is the whole point of a Gurney flap. At lower wing angles it actually raises the wing’s efficiency, since you gain grip without adding angle. On track, most drivers get the time back in corner exit speed and braking confidence. Any effect on highway efficiency is minor for a part this size.

Tesla Model S

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For the do it yourselfer or trained mechanic, our in-depth installation guides provide step by step detailed instructions on fitting your Tesla with Unplugged Performance Parts.
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Tesla Model S

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