Conventional Spring 9.5in x 5.5in x 550#

The Conventional Spring 9.5in x 5.5in x 550# from SWIFT SPRINGS is a precision-engineered coil spring designed for front suspension applications on performance and street vehicles. Built for drivers and mechanics who demand reliable load support and consistent ride height, this conventional spring delivers the predictable linear spring rate needed for both stock restorations and modified suspension builds. Whether you're replacing fatigued OEM springs or tuning your vehicle's geometry, this 550 lb/in rate spring provides the stiffness necessary to maintain proper chassis dynamics under varying loads.

Manufactured from high-grade steel and finished with a durable black powder coat, this spring measures 9.5 inches in length with a 5.5-inch outer diameter, making it compatible with most conventional coilover and strut-mount applications. The 550 lb/in spring rate indicates a moderately stiff spring suitable for vehicles running mild to moderate performance modifications—soft enough to absorb road imperfections on daily drivers, yet firm enough to resist excessive body roll during cornering or load transfer. The conventional design (as opposed to progressive-rate springs) ensures linear force delivery, giving you predictable suspension behavior across the full compression range and simplifying tuning when paired with quality dampers.

This front spring is ideal for muscle cars, street rods, and modified sedans seeking improved stance and handling without sacrificing ride comfort. Mechanics and enthusiasts value SWIFT SPRINGS coils for consistent quality and repeatable performance across matched pairs. Verify fitment with your vehicle's suspension architecture and damper specification before installation; pairing a 550# spring with appropriately valved shocks or struts ensures optimal bump compliance and rebound control. Sold individually—purchase as a matched pair for front suspension applications.