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Old 02-08-2011, 11:32 AM   #8 (permalink)
Master EcoModder
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Join Date: May 2009
Location: Charlotte NC / York SC
Posts: 727

05 DMax - '05 Chevrolet 2500HD
90 day: 18.48 mpg (US)
Thanks: 108
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BamZipPow used 2 piesce of mesh from a gutter guard to vent his underbelly.
Looks about 8"X16".
It would help if the bumper cover is acting like a parachute.
I agree that it would be better to direct the air below it though not through it, less resistance, which we all know is futile

I can't understand why my MPG's are so low..........
21,000lb, 41' Toy Haulers are rough on FE!
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