Active Off-Road Bumpstops provide off-road enthusiasts greater control over their vehicles' suspension travel. Using progressive-rate suspensions means that instead of a hard stop at the end of axle travel the axle energy will be absorbed when bottoming-out producing smooth, predictable, axle engagement and disengagement. Unlike OEM bump stops, Active Off-Road Bumpstops are made from natural rubber. Just like the Timbren SES line, Active Off-Road Bumpstops carry a Lifetime Warranty and a 100 Day Money Back Guarantee.ABSFR1504E replaces the rear OEM bump stops on the Ford F-150. Upgrade to Active Off-road Bumpstops and experience the difference.