Just one suggestion if your going down the relay path. Now i dont know if this applys to the crossfire. i dont know yet, because currently im modding my spare set of headlights, and will be installing them in the spring with 55w hids. But with my experience with installing HID's with relays on a charger/300. it would be good to pre order some of those cheap anit-flicker moduels. they are basically a capacitor across the +/- to pervent the pulsed voltage sensing from the headlight computer module from causing the relay to chatter/not work/not work very long.. Its just an added assurance as well. Ive orderd up a whole bunch of them just incase i need the for the crossfire once i tackle that project. But it works good on the LX cars when going the relay route.