Bilstein 5160 Gas Reservoir Front Pair 05-16 Ford F250 SD 4WD w/4-6" Lift Part Number 25-177435 Front pair of 2 shocks for vehicles w/4-6" front Lift Fits 4WD vehicles Shock boots sold separately. All necessary washers, bushings, and nuts included. Factory shock mounting bolts are reused for installation. Bilstein's 90 day limited warranty covers against defects and premature failure, for full details please reference the manufacturer's warranty information or contact us for further details.