Anyone know if the oemhid.com HID plug-n-play kit works with a halogen B5 setup?
 

And if so, how easy is the install?

as long as you get the h7 setup, easy install

Better quality than RS6 setup?

to do the RS6 setup you NEED HID E-codes/S4 Housings
 

not sure which one is better. protocolid says that the lower you go with kelvin, the more usable light there is on the road. the higher kelvin you go, the less usable light on the road, but the more blueish color of the lights.

the rs6/a8 kit = 4300k
those kits either use the d1s or d2s bulb fitment, instead of h7

i *think* the h7 kit is 5300k?

you don't have to go HID/S4 housings - all you need are the projector housings.
 

H7 is the type of halogen bulb that A4 uses, it has nothing to do with color.

Just make very sure you have projector housings before putting in HID upgrade.

Reflector housing (upgrade to e-codes first before even thinking about HID's)
<img src="http://pictureposter.audiworld.com/14019/audi00.jpg">

Projectors (will accept D2s bulbs)
<img src="http://pictureposter.audiworld.com/14019/audi01.jpg">