BMW was one of the first modern cars to have this on some of their newer models and it seems ford and chevrolett are catching on to the idea. they all use internal shutters.
the idea is sound but i suppose most oems use software that takes, speed, temperature, etc into considderation.
i'm planning to have a go at it sometimes useing a central locking motor and use the fan controller as an imput
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aer·o·dy·nam·ics: the science of passing gass
*i can coast for miles and miles and miles*
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