aFe Control Featherlight single-adjustable street/track coil-over systems were developed on the track and refined for the street. Packed with features, the coil-overs are precision CNC-machined from 6061 T-6 aluminum, and then hard anodized and assembled. They feature a monotube inverted design with a floating piston inside that divides both gas and oil for strength and consistent performance. Double digressive valving allows you to adjust rebound and compression with the turn of a knob. aFe Control Featherlight single-adjustable street/track coil-over systems are engineered for weight savings, optimum performance, and longevity, whether at the track or on the street.