NM Eng. Rear Adjustable Sway Bar Link Kit Mini Cooper F ChassisNow available, NM Engineering Adjustable Rear Sway Bar Links for MINI F55 56. Key features include: Heavy duty ball joints with Teflon lining Stainless Steel Spacers Grade 10. 9 Trailing Arm Bolts As you can see from one of the images bellow, MINI cuts cost by equipping the new F55 56 with links made from plastic. As it may be sufficient for factory 17 18mm hollow bar it will not perform optimally when paired with our larger 22mm Solid Anti Sway Bar.