Thread: cutting holes in your rear bumper
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Old 12-04-2009, 02:31 PM   #18 (permalink)
MadisonMPG
Master EcoModder
 
Join Date: Nov 2008
Location: Madison AL
Posts: 1,123

The Geo - '93 Geo Metro
Team Metro
90 day: 45.16 mpg (US)
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Yes, the holes work. *no sources, but i've seen it happen*

Guy gained about .2 on his 1/4, with a faster MPH.
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