If you buy the base kit then you will need relays. The base kit offers an option for $20 more that gives you everything you need. Because they offer several different kits... ie: lowbeam only, high and lowbeam, bulb temperatures, etc. contact the seller and find out exactly which kit they are selling.
Buy it all at once and you will make sure that there are no problems.
Great kit. Smallest ballasts on the market and a limited lifetime waranty. Choice of bulb temperatures make it customizable to achieve the look you want.
