Upgrade your 1999-2004 F450 with this high-quality Motorcraft ASH23486 Ford AU2Z-18V125-BB rear shock absorber. It features a double pipe shock absorber system that is gas-charged and easy to replace. This shock absorber is made of alloy steel and has a travel length of 9.88 inches. The shock absorber is designed with a screw-on mounting style and can be placed on the rear, left, or right of the vehicle. It comes with a shock and has a vintage part number of G63461, 34930, 344079, KG5441, 565063, 565044, and KG549. The item length is 24.75 inches and it has 100% accuracy of fit. This shock absorber is a perfect fit for your F450 and will provide you with a smooth ride.