2011-2015 Ford Super Duty (F250/F35) 4WD Revtek Performance Kit w/ Tubular Radius Arms 4-1/2" Lift Kit Works within the OEM suspension geometry No cutting or welding necessary Easy, bolt up installation. The most installer friendly system available Complete front and rear system, no extra components to order Black system components keep the OEM look intact Super heavy-duty, plated and powder coated components Manufactured utilizing OEM or better materials for strength and durability Maintains alignment specs