Type N1 is our exclusive racing model application which encompasses TEIN's technological innovations and extensive racing experience. The N1 damper is a mono tube design available in either aluminum or steel construction. Features full-length adjustment for individual adjustments of spring pre-load and damper length. Separate 20 x 20 way compression and rebound adjustment for fine tuning. The stroke and valving have been specifically designed for circuit racing conditions to provide maximum grip. TEIN highly recommends the use of TEIN racing springs with type N1 dampers.