Swift Spring bag 13" X OD 5.0" exhaust Screw CNC cut out of

Screw CNC cut out of aluminum alloy

-Increases horsepower

4" Straight cut tip

Swift Spec-R Springs 08+ MITSUBISHI LANCER EVO X GSR / MR CZ4A 4M020R

Swift Spring bag 13" X OD 5.0" exhaust Screw CNC cut out ofSwift Spring bag 13" X OD 5. 0" (1 bag for 1 spring). 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