is there a kit with the ballasts and everything for the sd or is it a universal kit?
The conversion kits are universal, based on bulb style. 2005-2007 use H13 bulbs. Not sure about the earlier models. All the conversion kits come with the bulbs and ballasts. Installation is pretty much plug and play.
Quick tutorial on HID.
HID bulbs
There are a four different styles of HID bulbs.
1. Single beam, you lose the use of high beams.
2. Xenon low/halogen high. Ok if you only use high beams occasionally.
3. Dual beam xenon. These actually move the bulb itself to change the beam. Some retract the bulb into the base and others systems tip the bulb down to produce a high beam effect.
4. Bi-xenon. Two xenon tubes on each bulb base and using 2 ballasts per side. IMO, this is the best but also most expensive and hardest to find.
Wattage
Most HID conversions are 35 watts. Some places sell 50-55 watt kits for extra money. I personally don't feel the need for anything more than 35 watts. I have been using HIDs in my vehicles for a while now and haven't seen where an extra 20 watts would make much difference. Proper beam pattern is more important than wattage. And since HID conversions are questionable in terms of legality I don't feel it necessary to attract the attention of law enforcement anymore than necessary.
Color/temperature
Contrary to popular belief hotter bulbs (higher Kelvin value, e.g. 8000K) actually produce less light than the cooler bulbs. 4200K - 6000K is considered white light and puts out the most light. 4200K will have a slightly yellowish tint to them but not to the point of halogen. 6000K is slightly bluish but not bad. 5000K is my personal preference if it's available. 3000K gives a very yellow light and work great in fog lights. 8000K and above gets very blue in color and light output is reduced.
Ballasts
There are analog and digital ballasts. Analog is cheaper and therefore that's what you find in most HID conversion kits sold on ebay or other such sites. The ballasts are larger than digital and it has been my experience that they produce a lot more radio frequency interference with CBs and such. Obviously being physically smaller the digital ballasts are much easier to find a place to hide them.
Wiring harness
Most places that sell HID conversion kits offer a relay harness which I highly recommend. Even though the HID lights are pulling less power through the factory switch than standard halogen bulbs I still like to use the relay harness and pull the power directly off the battery. The dual beam and true bi-xenon conversions should come with the relay harness standard.