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Spec R springs are wound with the same engineering and material as our sports springs
Whether you are looking for a comfortable ride for your commuter or a more aggressive setup for your race car
Flat Wire Linear Rate Bump Springs 1100 lbs/in
Swift Sport Springs 09-15 Infiniti G37 X COUPE / Q60 AWD CKNV36 4N911
4 inch length
Swift Flat Wire Linear Rate Bump Springs 800 lbs/in Helper Springs Spec R springs are woundFlat Wire Linear Rate Bump Springs 800 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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