http://www.realoem.com/bmw/showparts...26&hg=41&fg=60

What's the best way acquiring one one these? New from BMA auto parts or elsewhere like e-bay? Looks like you drill 4 holes to secure the spoiler.

Secondly, is there any functional value of the M Rear spoiler (eg to keep the back more stable at high speed), or is it just eye candy?

regards

kristian