You asked for it and AFCO delivered! Responding to market demand, now you can run high-quality AFCO springs and still get that “blacked out” look! Get the performance you are looking for with the tightest tolerances in the industry. All AFCOILS® are manufactured using ultra-high tensile wire. These springs are guaranteed not to lose more than 1% of free height. Engineered design resists spring lean and bow. Best warranty in the industry!