Swift Springs Standard Coilover Spring (Barrel Type) - ID: 2.5" / Length: 12" Progressive Spring Rate (lbs/inch):200/500 AST Lowering Springs for the

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Swift Springs Standard Coilover Spring (Barrel Type) - ID: 2.5" / Length: 12" Progressive Spring Rate (lbs/inch):200/500 AST Lowering Springs for theSwift Springs Standard Coilover Springs in 2. 5" ID and 12" length are precision engineered barrel type race springs built to outperform conventional suspension springs in every measurable category. Designed for coilover dampers using standard SAE sizing, these 2. 5" ID Swift springs are manufactured in Japan from proprietary H5S. TW high tensile alloy steel. The barrel design eliminates spring deflection and bowing, preventing spring rate