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Old 03-26-2014, 10:58 AM   #15 (permalink)
j12piprius
Liberty Lover
 
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Join Date: Feb 2011
Location: central california
Posts: 587

pris prius - '12 Toyota plug in prius
90 day: 71.09 mpg (US)
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Quote:
Originally Posted by Gasoline Fumes View Post
Yes, I cut off the top section of an extra bumper cover and used it as a splitter. Obviously it perfectly matches the contour of the bumper on the car. It sticks out past the original bumper, moving the stagnation point much lower. I hope I'm using that term correctly! I believe it's keeping air from going under the car without adding frontal area. No ABA testing done, but I did get my best highway trip mileage after installing it.
That's a great idea.

How did you attach it to the bottom, and how much did it raise up your mpg?
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