Well, when it comes to installing those kinds of HID kits into silvia brick lights, bi-xenon or otherwise, it's literally a matter of buy the kit with the bulb that fits that socket, install it, and plug in the wiring

That's it. If you can change the headlight bulb, you can install a cheap ebay HID kit.
The problem is, those headlights have JDM cutoff, so the light won't be projected correctly. And those cheap HID kits are hit / miss as to how then end up looking anyways. So blazing HID's plus reversed cutoff means lots of blinded oncomning traffic, poor visibility on your shoulder of the road, and possibly tickets for "faulty" equipment.
If you don't care about cutoff and all that stuff, then the cheap HID kits are fine. Personally, I'd recommend checking out this
http://www.theretrofitsource.com/produc ... cts_id=227 It will give you the right cutoff, a much better looking beam, and still installs pretty easy. It's pricier, but works WAY better. Of course, you'll be running projectors at that point, but they'll be in bricks. But TMK getting bricks to work with HID's, and getting the right cutoff, and not having a blinding beam pattern, is a massive amount of work. They're just not designed right for HID's.
If it's a track car, and doesn't see road much, slap that cheap kit in and call it a day

But if it sees public roads pretty frequently, I'd really suggest going the extra 1/4 mile and getting a kit that will do things right
