Professional installation is required
Swift Spec-R Springs 08+ MITSUBISHI LANCER EVO X GSR / MR CZ4A 4M020R
Round Wire Linear Rate Bump Springs 700 lbs/in
Flat Wire Linear Rate Bump Springs 700 lbs/in
Swift Progressive Helper Springs 65mm ID, 4 in length 5.3-11.6kg/mm Pair Bump Springs Professional installation is required65mm ID, 4 in length 5. 3 11. 6 kg mm Progressive 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