BC Racing BR Series Coilover Kit for 75-83 BMW 3 Series (45mm) - E21 Mono-tube shock design 30 levels of damping force adjustment, adjust compression/rebound 2 axis bushings allow precise, single wrench adjustment accurately under load. Front Spring Rate: 7kg/mm Rear Spring Rate: 5kg/mm Front Camber Plates Included, Rear Camber Plates Not Applicable Separate full length height adjustable, 1 year warranty and rebuildable