The Step 'N Guard Modular System for Ford Super Duty Dually Trucks is a revolutionary utilitarian upgrade that becomes a part of your truck's OE hitch and frame. Unlike standard mud flaps, this system provides a level of structural integrity that's unmatched. Dual-Purpose Functionality â A unique, heavy-duty step and a robust mudflap in one integrated system. The step holds up to 300 lbs., giving you easy access to your truck bed while maintaining the system's structural integrity. Superior Protection â This solid-mounted system protects your truck's finish and anything you're towing from road debris, rocks, and the elements. Customizable Fit â The system offers 4" of width adjustability to accommodate various wheel offsets, and the extra long flaps can be trimmed to your desired length. Easy to Use â The system mounts directly to your existing receiver hitch and is easy to remove when not in use. Vehicle FitmentMake: Ford Super Duty DuallyModel Years: 2017 to Current Step holds up to 300 lbs. System offers 4"" of width adjustability to accommodate various wheel offsets Mounts directly to your existing receiver hitch & is easy to remove | Step N Guard Step 'N Guard Ford Dually Kit