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60mm ID All Kits come with 4 thrust sheets & 4 metal washer sheets (1 kit for 2 springs)
120 lbs/in Barrel Type
Round Wire Linear Rate Bump Springs 2500 lbs/in
Swift Sport Springs 06-13 Lexus IS250/IS350 RWD GSE20L GSE21L 4T040
Swift Spring bag 16"~18" X OD 5
Swift Flat Wire Linear Rate Bump Springs 1000 lbs/in Pull Bar Springs 60mm ID All Kits comeFlat Wire Linear Rate Bump Springs 1000 lbs in Swift Bump Springs are made from a proprietary material. 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.
