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      03-26-2016, 10:11 AM   #3
XMetal
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2008 Z4M Coupe  [10.00]
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Quote:
Originally Posted by Digs View Post
I think you're correct about sand/dirt getting in so they shut them off. I'm often cleaning sand out of the ducts with the flaps still in place. It's just an inherently bad design for brake cooling how it blows air straight onto the tyre and while not being ducted into the caliper area.
Well...I would assumed that if it were directed toward the caliper area, same reasoning applies - that your calipers would get sand blasted with sand/dirt. For a street car, I don't think you would want the potential of getting sand/dirt trapped in between your rotors and pads
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