Conventional Spring 9.5in x 5.5in x 500#

The Conventional Spring 9.5in x 5.5in x 500# by SWIFT SPRINGS is a direct-wound coil spring designed for custom suspension builds, lowered vehicles, and performance chassis modifications. This spring is ideal for those who require enhanced performance beyond factory spring rates, making it suitable for drag cars, street rods, and track-focused suspensions.

With a 500-pound spring rate, 9.5-inch free length, and 5.5-inch coil diameter, this spring provides a balance of compliance and support throughout the suspension travel range. Its conventional winding design offers a natural rate curve that begins softer under light loads and progressively stiffens, reducing the risk of bottoming out while maintaining stability during aggressive driving conditions.

This spring is particularly beneficial for fabricators, suspension tuners, and hot rodders when paired with matched dampers and optimized geometry, especially in independent rear suspension conversions and vintage muscle car restorations.