The AFCOIL® yellow coating is recognized for quality and dependable performance. Here’s why top racers demand AFCOILS®: • Manufactured using ultra high tensile wire. • Tightest tolerances in the industry – Get the performance you deserve. • Best warranty in the industry – guaranteed not to lose more than 1% of free height. • 2-5/8” I.D. designed to prevent spring lean and bow. • Barrel design prevents spring bow.