compatible with F-150 4WD 2004, Steering Stabilizer by Zone Offroad. Installing a Zone Offroad steering stabilizer system will enhance vehicle control by reducing steering shimmy and bumpsteer. These quailty systems are specificlly designed to improve tire wear and front-end component life as well as lessen side to side motion caused by wide tires and unpredicable road conditions. Go with this top-grade product from Zone Offroad made with professionalism in mind to bring enhanced performance to your auto and efficiently serve for years