Arm. Stopper. Bumper. Radius. Coil Spring Damper. Lower Control Stop.
A component (mounted in the center of the Spring) which cushions the Spring as it is compressed.

Coil Spring Damper

Fits E-150, E-250, E-350 Super Duty, E-450 Super Duty

Suspension Coil Spring - Repair or Replace
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your 2008 Ford E-250 might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local Ford service department to have your suspension system evaluated.