Thanks for the quick replies!! Thats so awesome that I can get those Yakima Universal Mighty Mounts.
Here is the buttondown aero attachment I just bought today. It was on sale for a good price.
The product description says it has Universal mounting attachment fits most round and square bars and Fits most factory bars out of the box. I'll give it a try and see what happens.
But if I still need the universal mighty mounts, its not too bad of a price from amazon and can then use them for both of my cars.
2011 335i with M-Sport Performance package, Carbon Fiber interior trim, gloss black kidney grills. 18" Apex Arc-8, JB4, ETS Charge pipe