I think it is pretty easy, but I used the OEM wires, not any relay or something, almost plug and play, but you have to check if your wires can hold 15 amps, cause regular OEM lights only need 10 amps, if that so is pretty easy, and then you just change the fuse to 15 amps, you have to buy a Xenon Kit rebased for your type of bulb not OEM xenons, cause is going to be a PITA to installed them
Hope this helps