The Bilstein 33-318967 is a rear shock from the B8 5100 series, fitted to the 2015–2021 Ford F-150 and sold under MPN 33-318967. It is meant as a direct upgrade over the factory rear damper for buyers who want a rear shock built for their truck's suspension rather than a generic replacement. If you are searching for a 15-21 F-150 B8 5100 rear shock, this is the part number to match against your current unit. Matching the damper to your truck's actual rear ride height matters more than price alone, because a shock that is not built for your lift can sit at the wrong extension or bottom out under load.
Before ordering, confirm your truck's rear lift height and compare the extended and compressed lengths of your existing shock against this part, since those dimensions determine whether the unit seats correctly. Follow the manufacturer's installation documentation for hardware and torque values rather than relying on guesses. Searches for F-150 rear shock upgrade, Bilstein B8 5100 rear fitment, and 2015-2021 F-150 rear lift shock replacement tend to surface this exact application, so verify the MPN against the label on your old shock before installing.
