The Detroit Speed, Inc. coilover kit is designed to convert your stock front subframe to a coilover shock and spring suspension system. This kit allows the latest in coilover spring/shock technology to be bolted into your F-Body, X-Body, or A-Body application, bringing your classics handling and ride into the 21st century with our unique Detroit Tuned valving. The Detroit Speed front coilover kit offers extensive ride height adjustability and Detroit Speed valving, allowing you to easily adjust ride height and spring rate to suit your driving needs, based on a 4 in. stroke shock. Our springs are 100% quality checked, inspected, and engraved with the spring rate and will not lose their height over time. Our optional single or double adjustable coilovers offer adjustability with multiple settings for both low speed and high speed rebound. The ultimate package is our monotube remote reservoir coilover set which offers separate fluid canisters for optimum adjustability and improved heat dissipation.Double Adjustable Shock:This is the most race winning shock JRI has in its stable. With its two independent adjustments and the enormous range of adjustment it can be set to the exacting demands of the driver and performance levels required while providing excellent ride quality on the street.Spring Rate: 650lbs/inSpring Free Length: 10in