I'd like to be able to tell you that the stock headlights were really deficient and I needed an upgrade. But that'd be a lie. I just like HIDs. And I found this HID kit on eBay for 27$ with free shipping. So here we are!
The T100, like a lot of Japanese offerings from the 90s, uses H4 bulbs as stock. While they do their job perfectly well, they make the conversion to HID a little bit trickier. The reason that's the case is because the H4 has both high and low-beam as two filaments in one bulb. I've used other kits that use just an HID low beam, but with a standard filament bulb for the high beam. While these worked so-so, I do use my high beams a lot, so I prefer the HID high beam as well.
This Bi-Xenon kit solves the issue by mounting a single HID bulb on a moveable base. When you energize the high beam circuit, a magnet is activated and pulls the bulb back slightly, giving it the correct alignment in the housing to give you HID high beams, while retaining the proper cutoff and function of the low beam. I was skeptical about this because I thought the beam pattern would be a terrible compromise. I finally decided to give one a try and what a surprise! Teh beams are fantastic. Me likey long time.