Spring Conventional 8.00in x 5in x 400lb

The SWIFT SPRINGS Spring Conventional 8.00in x 5in x 400lb coil spring is a front-end suspension upgrade engineered for drivers and mechanics seeking precise handling control and consistent ride quality. This conventional coil spring is built for custom suspension systems, lowering kits, and performance builds where linear spring rate characteristics and reliability matter most. Whether you're tuning a street car, race vehicle, or restoration project, this spring provides the foundation for a dialed-in suspension geometry and predictable chassis behavior.

Manufactured from high-tensile steel and finished with a black powder coat for corrosion resistance, the 8-inch length and 5-inch outside diameter configuration delivers a 400 lb/in spring rate—ideal for mid-weight vehicles and applications requiring balanced vertical stiffness without excessive harshness. The conventional (non-progressive) design means consistent load support throughout the spring's travel, making it predictable under both steady-state cornering and transient load changes. At 4.61 lbs per spring, weight is minimized without compromising durability, and the linear rate curve integrates seamlessly into tuned suspension packages where load transfer and anti-roll characteristics are optimized for your specific setup.

This spring is best suited for front-end applications on compact to mid-size vehicles, classic cars, drift platforms, and road-racing builds where suspension geometry and spring rate work in concert with dampers, anti-roll bars, and control arm angles. Installation pairs perfectly with matched rear springs and quality monotube or twin-tube shocks tuned to the 400 lb/in rate. Verify your vehicle's spring pocket depth and coil bind clearance before ordering; the 8-inch length works within most modern and vintage independent front-suspension designs, but suspension geometry checks are essential for optimal performance and safety.