The Anti-say bar, also known as a swaybar helps bumps on left side of car from affecting right side of car and vice-versa.
Upgrade
B210 has a swaybar larger than B110.
See: B210 Swaybar Upgrade
B110: 17mm B210: 18mm with A12 or A13 B210: 20mm with A14
Aftermarket
http://swaybars.com/index.asp?PageAction=VIEWCATS&Category=1300
- Front: #877, 7/8" $168
- Rear: #225, 5/8" $132