This is completely plug and play. I got a pair of headlights from vision auto labs and am sending back my cores now. Evan at vision offers a ton of options like retrofitting Lexus Rx350 projectors for greater output and light quality, but I opted to just get a pair that was blacked out with the DRLs frosted to look closer to the refresh. He is down in SD and communication was a little tough but all in all he delivered.