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Old 03-30-2015, 09:58 AM   #2 (permalink)
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Join Date: Dec 2007
Location: Germantown, WI
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CM400E - '81 Honda CM400E
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The general rule of thumb is to always block the upper grill first. This pushes more air over the top of the car (vs more air under the car) where the aerodynamic shape is more clean.

I'm not sure why you'd want to add vents to the hood.
Current project: A better alternator delete
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