We are the pioneer brand leader, professional and specialist manufacturer and developer for damper kits. We have close co-operation with main suspension manufacturers since establishment; and we have thorough understanding ofdamper’s structure, technical know-how to present a excellent damper kit. Extend is improving its products through testing by years before it has been marketedWe are the pioneer brand leader, professional and specialist manufacturer and developer for damper kits. We have close co-operation with main suspension manufacturers since establishment; and we have thorough understanding ofdamper’s structure, technical know-how to present a excellent damper kit.Extend is improving its products through testing by years before it has been marketed