Originally Posted by Nelrock
They also put that tiny OEM spoiler on the trunk of the E92...I can't believe that has any functionality.
I've even heard some argue the weight savings of the carbon fiber roof make a functionality arguement thin.
So...I think BMW does a few things that are for style vs functionality. I for one...like the dome...and hope it stays. If not...I'm sure one of the aftermarket companies will revive it.
Believe it or not, the M3 spoiler makes a pretty good difference in downforce. Someone posted pictures of wind tunnel tests with and without the spoiler, and the difference given the relatively small size of the lip was impressive.
As for the CF roof, its function isn't specifically to reduce the car's overall weight (which it does), but it's to lower its center of gravity.