10 inch length
200/500 lbs/in Progressive
Swift Sport Springs 07-12 Lexus GS350/460 GRS191 4T051
and spring rates from 3kg (168lbs) all the way up to 34kg (1900lbs)
Swift Helper Springs 60mm ID, 5.3 in length 0.1 kg/mm Pair Bump Springs 10 inch length60mm ID, 5. 3 in length 0. 1 kg mm Swift Helper Springs are made from a proprietary material. Helper springs allow the spring to stay on mounted on the coilover perch when the shock is under negative or zero load, also known as droop travel. The same springs are used in Super GT, Formula Nippon, F3, F3000, Super Taikyu, IMSA, Pirelli World Challenge, Rally America, VLN, Le Mans Series, Formula Drift, and many other professional racing avenues.