Swift springs are use a new advanced spring material designated H5S.TW, which is stronger than regular silicone chrome spring material. This makes for a lighter spring for the same spring rate, and provides more stroke (due to less coils). Barrel design reduces spring bowing when compressed, providing for a more linear spring rate through the compression stroke and reducing side load on the shock. Replacing your standard coilover springs with Swift springs can improve the performance of your coilovers.
We offer these universal race/coilover springs (in 2.5"/65mm ID or 2.25"/60mm ID) to fit most coilovers. Please measure the inner diameter (ID) of your existing springs, or contact your coilover manufacturer for information.
Note: KTS coilovers use 65mm ID springs. Zeal coilovers use 60mm ID springs. Our Mid Links for the 350Z/370Z/G35/G37 use 65mm springs.
Priced as a pair (2 springs).
Please reference Swift's website for all spring length, ID and rate combinations http://www.swiftsprings.net/products/universal/metric-coilover-springs.html
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All prices are in USD