Custom Plug and Play Single Xenon wire harness from any stock car application to any HID bulb application for your new HID Headlights! Each set features a 40Amp/12Volt relay, a female plug to plug into your factory harness to use as an on/off switch, a fuse for extra security, ground wires, a power wire to your battery for current, and two male plugs to plug into your new HID kit!!!