I've been checking this out for my z16.
(is this the stuff you don't recommend?)
Re: HID replacement setup.
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Its very easy to install. I just took the black plastic off which covers around the glass then i took the fiberglass part thats the color of you car. You take these same things off when your changeing the stock bulbs. After that its easy its plug and play. The units are not heavy. its just like a stock bulb but it has a ballast which i stuck on the break duckt plastic. The ballast coverts the power. The bottom link will show you how to take off the light. You could get it installed at most automotive places. Some people here said they got charged 20 dollars for the install. I did mine myself. If you have any questions just pm me.
http://www.c5forum.com/diy/eurolights.php
Let me know.
zBill.