Quote:
Originally Posted by Remonster
The side gills do serve an important purpose, they vent hot air out of the engine bay. Notice that the X5M and X6M don't have them, probably because their engine bay is so large and there's so much frontal area for intakes so they don't have issues venting the heat but this proves that BMW doesn't slap vents on a car unless they're useful.
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They're a syling cue, and not much more. You're not moving much air through that opening.
Especially when you consider how much pastic covering is between the engine and the vent (The hood vents are a different story, as you can also see).
