I own a 1999 Cadillac Catera with an HID upgrade. The best on the market are the Mcculloch HID conversion kits. You can find them at
www.rjdezignz.com. They have good pricing and fast shipment. These kits just plug-&-play. You get 2 bulbs, 2 ballasts, and 2 ignitors. They are all wired together already so you just plug the factory wires into the ignitor, and the new HID bulb into the ballast. 15 min job and they look great! Much brighter and they consume less energy from the battery! You can get ahold of "rob" the owner at 513.678.9899.