imapaler mine are d2s also, low beam b5.

 

4300k will give u best output. 6000k is what I have and I like them a lot. Pure white with a blue hue to it.

 

ehhh dont like MKS i bought 2 kits from them for my car and it was suppose to be 10000k...which is a deep blue...they are very white with a slight hint of blue...i was disappoined...

 

2001 A4
low beams- H7
fog lights- H7

 

The higher the "K" value the more color output, The lower the "K" number the more light output (from what i have been told) 4300 are gonna be closest thing to stock hid's for an audi. 6000 is gonna be a more white and the higher you go the more color your gonna get. I recently bought a 10k kit and it is VERY blue and VERY bright. You may want to consider ecodes or some kind of HID projection headlamp because youWILL BE HATED if you put a hid kit in a pair ofOEM halogen headlights, i know because i have a 10k kit with stock HALOGEN projectors and im havent been very well liked on the roads at dark since.

 

HID's FTW!! check out visionbulbs.com and type in the code audifourms to get a 15% discount off your purchase