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70mm ID All Kits come with 4 thrust sheets & 4 metal washer sheets (1 kit for 2 springs)
130 lbs/in Barrel Type
It's time to give your BMW the adjustment it needs
220 lbs/in
140 lbs/in Barrel Type
Swift Round Wire Helper Spring 3" ID 4" Length 40 lbs/in Upper Intercooler Pipe 70mm ID All Kits come3in ID, 4 in length 40 lbs in 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.
