Conventional Spring 9.5in x 5in 400LB

The SWIFT SPRINGS Conventional Spring 9.5in x 5in 400LB is a precision-engineered coil spring designed for automotive suspension modifications and performance tuning. Built for serious enthusiasts and mechanics who demand predictable handling characteristics and reliable spring rates, this front suspension spring delivers the consistent load support required for both street and track applications. Whether you're lowering your vehicle, adjusting ride height for a specific build, or replacing worn OEM springs, this conventional coil spring provides the foundation for a tuned suspension geometry.

Constructed from high-quality steel and finished with a durable black powder coat, this spring features a 400 lb/in spring rate—a moderate stiffness rating suitable for daily-driven modified vehicles seeking improved stance without excessive harshness. The 9.5-inch length and 5-inch outer diameter are engineered to fit standard front suspension applications, while the 400 lb/in rate ensures consistent wheel control under acceleration, braking, and cornering. The conventional design—as opposed to progressive springs—maintains linear spring rate throughout compression, providing predictable suspension behavior and simplifying suspension tuning and alignment adjustments for customized builds.

This spring is ideal for mechanics and enthusiasts building lowered suspension systems, performance street cars, or vehicles requiring OEM replacement with upgraded spring rates. Paired with compatible dampers and sway bars, the 400LB spring rate balances reduced ride height with vehicle stability. Always verify fitment against your specific vehicle platform and existing suspension geometry before installation; spring rate selection directly impacts handling response, bump compliance, and overall chassis dynamics. Sold individually—most suspension applications require two front springs for proper balance and safety.