TEIN USA is the US office of the famed Japanese suspension tuner TEIN, known for its superior coilover suspension and lowering springs.

TEIN started with humble beginnings in Japan as a suspension provider and eventually grew to the international company it now is.  It let its products do the marketing for them since their coilovers in many different application are some of the best in the world.  If you've been around the tuning scene for a little bit, chances are that you've heard of TEIN.