Swift Springs Metric Coilover Springs 65mm ID, 6 inch length, 30 kg/mm Pair Metric Coilover Springs and spring rates from 3kg

and spring rates from 3kg (168lbs) all the way up to 34kg (1900lbs)

and many other professional racing avenues

Formula Nippon

Swift Standard Coilover Springs are made from a proprietary (H5S

Super Taikyu

Swift Springs Metric Coilover Springs 65mm ID, 6 inch length, 30 kg/mm Pair Metric Coilover Springs and spring rates from 3kg65mm ID, 6 inch length, 30 kg mm Swift Metric Coilover Springs are made from a proprietary (H5S. TW.) Material. This allows Swift Springs to manufacture a spring that is has more stroke, increased traction and handling as well as a spring with less coils, resulting in a lighter spring with less unsprung weight. The same springs are used in Super GT, Formula Nippon, F3, F3000, Super Taikyu, IMSA, Pirelli World Challenge, Rally America, VLN, Le Mans