Parts kit number RIK-2 does one whole vehicle equipped with two sealed beam or H4 headlights. It is $49. It includes all relays, relay brackets, terminal blocks, terminals, plugs, sockets, fuses and fuseholders, and is the parts kit that was used for the
Allpar installation article. You supply your own wire and use the parts from the kit to build up your own wiring harness per
this article. Parts are all premium-grade items (e.g., Bosch-Tyco dual-output 30/40A relays, ceramic headlamp sockets, etc.) that accept large-gauge wire; this is not the "consumer grade" junk you can find at the parts store. The in-car switches continue working normally, and you will not need to cut or otherwise disturb any of the vehicle's original wires.