Coil-Over Spring 20in x 5in x 80lb 2.5in ID

The Coil-Over Spring 20in x 5in x 80lb 2.5in ID from SWIFT SPRINGS is engineered for serious suspension builders and performance enthusiasts tackling custom lowering, coil-over conversion, or competitive motorsport builds. This precision-wound compression spring delivers the progressive rate and consistency required to dial in ride height, load capacity, and handling geometry across street cars, track vehicles, and weekend warriors. Whether you're fabricating a full coil-over kit or replacing worn OEM springs, this component gives you the foundation to achieve repeatable, tuned suspension performance.

Built with SWIFT SPRINGS' proven spring steel and heat-treat processes, the 80-pound rate provides medium stiffness suitable for both daily-driven and track-focused applications without excessive harshness. The 20-inch free length and 2.5-inch inner diameter accommodate most modern double-adjustable shock bodies and universal coil-over sleeves, while the 5-inch outer diameter ensures reliable coil bind clearance and eliminates binding under full compression. The carefully controlled spring constant delivers linear force progression, enabling predictable weight transfer and front-to-rear brake bias tuning that competitive builders demand.

This spring pairs ideally with adjustable dampers and custom suspension geometries on import sport compacts, drift platforms, autocross machines, and road racing builds where spring rate matching is critical. Installation requires proper shock tower clearance verification and spring perch height planning to achieve target ride heights and maintain adequate suspension travel. Weigh all four springs during sorting to confirm rate consistency across the set; SWIFT SPRINGS maintains tight tolerances, but pre-assembly inspection ensures balanced handling and eliminates setup variables during initial setup and tuning phases.