if you run xenon, then they are plug-n-play as far as i know. Though, you may need some coding because of the LED turn signal. From the looks of the pics in your sig, you should be okay.
They cost around $700 for a pair, you can find them on Tischer or Ebay... they'll be about the same price no matter which vendor you choose. I would search the classifieds first and then branch out to find the best possible price to fit your budget.
WTB: 3 Stage Intake Manifold and components - PM me your asking price.