This relay kit is made for certain years of the Nissan Armada and Nissan Titan without a factory tow package. It is recommended for applications where over-protection is required. The kit includes two small blue relays and one large brown relay that are required to complete the circuits for a trailer wiring connection., RELAY KIT FOR NISSAN ARMADA, TITAN #57000 Recommended for applications where over-current protection is required. Fits Nissan Armada or Titan without tow package.