Tein Coilovers - Street Basis: Tein Street Basis Damper is the evolution of the popular BASIC coilover model. It incorporates new internal and external components, newly developed coatings and new manufacturing processes.Tein engineers have spent many hours developing new seals and internal components to improve durability and product life. This was one of our major goals for the new model. Newly developed “ZT” coating for improved durability and hassle-free ride height adjustm