Koni has been in business for 150 years, involved in automobile dampers since 1932 and has produced adjustable telescopic dampers since 1945. A favorite among racers and offered as a performance option by the factory. Many enthusiasts view koni as the premier manufacturer of adjustable struts in the world. Koni struts are made from the highest quality raw materials and machined to the highest tolerances. This quality allows koni to offer a limited lifetime warranty on their struts. Koni struts are adjustable and sold each. Classic style, rebound adjustable off the vehicle. Sold each.