These are rear fiberglass bedsides for a Ford Excursion. They are 2 inches wider per side and are mounted with fender washers. there is trimming involved around the bottom of the wheel wells for larger clearance. These bedsides have the new 2017 Ford Super Duty tail light cutouts to update the style of the truck. You can fit up to 40" tires. Fender washers are sold separate. Price is for the pair (RT/LT).