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      10-31-2013, 03:25 PM   #14
edennelson
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Drives: '14 E71 X6M, '14 I01 i3
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Location: Portland, Oregon, USA

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Quote:
Originally Posted by Chio View Post
It will not do anything to mpg! When they were blocked it was like hitting a wall! Now they are open and the air can flow threw !
People think removing the tail gate from their pickup allows air to flow threw...
It in fact creates a low pressure area behind the cab and causes mpg to suffer.

The OP asked for downside. The downside is a small decrease in mpg.


Last edited by edennelson; 10-31-2013 at 03:42 PM..
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