A must if your vehicle is fitted with larger headlight Bulbs or if you are considering to fit them. If you run larger headlight bulbs onto standard wiring there is a high possibility the wiring and / or the switches will melt down due to the heat generated. This loom is well made and will remove all current ( except enough to activate the relays) flow off the original wiring and switches. The loom is easy to fit and comes complete fully wired with 2 x relays, fuses, headlight trigger plug and 2 x heavy duty H3 bulb electrical plugs.