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swift spec-r springs are designed to the upper limits of the oem shock valving
2008-up G37 Coupe
Fits Berk Technology V1 intercooler kits and Greddy "style" intercooler kits
600 lbs/in Barrel Type
Swift Round Wire Linear Rate Bump Springs 1400 lbs/in race swift spec-r springs are designedRound Wire Linear Rate Bump Springs 1400 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.
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