QA1 Coilover Shock and Spring Packages offer a convenient, easy to order, pair of shocks and their corresponding springs.  These kits combine our best-selling Proma Star shocks with powder coated springs into one package that makes ordering more convenient and streamlined.  Also included are a set of spanner wrenches and thrust bearings to make your ride height adjustments and ensure you have everything you need to finish the job. EASE OF USE Single adjustable shocks feature simple shock tuning.  Simply firm or soften the ride quality with the turn of the 18 click adjustment knob. IMPROVED DRIVING EXPIERIENCE Tune your shocks firm for a track day or spirited driving, or soften them up for a comfortable cruise. TYPICAL USES Great for street cars, cruisers, or casual track day enthusiasts. RIDE HEIGHT The shocks should measure between 12in.-12.5in. from center of eyelet to center of eyelet when at vehicles desired ride height. More kits are available with other shock length options. SPRING RATE Spring rate selection can be very subjective and can vary depending on multiple variables and uses. : 350 lbs./in. Spring Rate: 1000-1300 lbs. independent suspension axle weight recommended: 1800-2000 lbs. solid axle weight recommended: More kits are available with other spring rate options