They are plug and play, but you should install the optional module/wire harness. This will raise and lower your low beam when you flip your high beams on. It's pretty cool. Also, when you turn your lights on they raise to the up into position. I did this upgrade last year and really love it. To me it's worth the money. I bought from suncoast porsche in Florida. They had the best price I could find.
FYI, I didn't know this until after I Installed them, the high beam light is not litronic. So you'll still see the same old yellow light when they're on.
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