Type N1 is Tein?s exclusive racing model application, which encompasses Tein?s technological innovations and extensive racing experience. The N1 damper includes full length height adjustment, separate compression and rebound adjustment for experienced drivers. Tein highly recommends the use of Tein Racing Springs with Type N1 dampers. Please note that these are for racing use only. Dampers are sold separately. Please contact us to discuss your spring options and for availability.