The Detroit Speed, Inc. A-Body Coilover Conversion Kit allows the latest in coilover spring/shock technology to be bolted on to any A-Body, bringing your classic's handling and ride into the 21st century with our 'Detroit Tuned' valving. The base coilover package offers extensive ride height adjustability and Detroit Speed valving. 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.Spring Rate: 250lbs/inSpring Free Length: 12inDouble 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.