Koni 2100 4045 Frequency Selective Damping Kit for Mazda3/Mazda5
FSD is the first premium shock absorber that offers superior handling without compromising ride quality for cars and light trucks, SUVs, motorhomes, and service vehicles. FSD is firm to control large body motions and cornering but soft for comfort over expansion joints and rough roads. FSD's patented technology not only adds comfort and refinement but also improves grip and safety in daily driving.