yes i do i was'nt going to buy HID's without one. and i also got the digital slim ballast. they arent just for looks the supply the power in a more uniform current therefore giving your bulbs the maximum life they should have.i tried to completly hide evrey wire and evrey ground and evreything. i ran the relay harness wires underneath the plastic shroud next to the relay. and also the i only had white self tappers so i painted the head of the bolts black.