SKU: SWI140-300-150
MPN: 140-300-150
The SWIFT SPRINGS Coilover Spring 14in x 3.0in x 150lb (part number 140-300-150) is a precision-engineered coil-over suspension spring designed for custom suspension builds, off-road platforms, and high-performance tuning applications. Built from steel with a black powder coat finish, this coilover spring delivers the controlled spring rate needed for vehicles requiring precise ride height adjustment and load-bearing capability.
The 14-inch length paired with a 3-inch inner diameter provides compatibility with standard coilover shock assemblies commonly used in suspension upgrades. The 150 lb/in spring rate—measured as the force required to compress the spring one inch—determines how the spring responds to load transfer and body roll during acceleration, braking, and cornering. This mid-range rate suits suspension systems designed for daily handling improvement without excessive harshness, making it a balanced choice for drivers upgrading from factory springs. The black powder coat protects against corrosion in varied environmental conditions while maintaining the aesthetic consistency of coated suspension components.
Coilover springs like this unit are essential for enthusiasts building custom suspension geometry, lowering systems, or track-focused platforms where spring rate selection directly impacts vehicle dynamics. Whether paired with adjustable dampers for street use or integrated into a full coilover setup for performance driving, the 150 lb/in rate serves as a foundation for fine-tuning suspension stiffness to match driving style and vehicle weight. Buyers selecting a coilover spring must verify inner diameter, length, and spring rate compatibility with their shock body and suspension mounting points before purchase.
SWIFT SPRINGS is recognized in the suspension aftermarket for producing coil springs across a broad range of rates and geometries. The 140-300-150 specification is commonly stocked for applications where mid-range spring rates are required; buyers should cross-reference vehicle platform fitment and shock specifications with the manufacturer's compatibility guides to ensure proper installation and performance.
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