Last updated 2021-01-20, BDS Suspension , BDS:123416 , This kit box will now fit both the 3.5 and 4 inch axles , 2017+ Ford Super Duty Recoil traction bar mount kit , RECOIL Traction Bars BDS Suspension introduces a revolutionary spring loaded traction bar system engineered to improve traction and limit axle wrap without negatively affecting suspension travel or ride quality. These next generation RECOIL traction bars