Has anyone got the spec for the oem swaybars

http://www.realoem.com/bmw/enUS/show...diagId=33_1865

Much as I would like a nm one
Getting it shipped to the the uk, would be very expensive
Trying to figure if it's worth the time to upgrade

These bushes suggest it might be quite thick??

http://www.powerflexsuspensionbushes...14-30598-p.asp

I'm guessing all are hollow but the sport ones have thicker walled tube ?