SKU: SWI120-250-400V
MPN: 120-250-400 V
The Swift Springs Coilover Spring 12-inch x 2.5-inch 150–400 lbs/inch Progressive is designed for serious suspension builders and performance enthusiasts who demand adjustable ride quality without compromise. This progressive-rate coilover spring serves as the foundation for custom suspension setups on street cars and track builds, focusing on performance rather than general daily driving.
Swift Springs' progressive spring design features a spring rate that increases as compression deepens, providing a critical advantage for vehicles that must handle both smooth pavement and aggressive cornering loads. The 12-inch free length and 2.5-inch diameter ensure compatibility with most modern coilover sleeves and damper bodies, making it an ideal choice for aftermarket suspension systems.
Performance-focused builders typically install these springs as part of a complete coilover assembly paired with quality dampers tuned to enhance handling precision. The progressive rates minimize harshness during initial suspension movement while preventing bottoming-out during hard compression, maintaining consistent wheel contact and vehicle control throughout the suspension's operational window.
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