If you want to run HID on a 2000 or older TW you'll need to add a battery and regulator to the lighting circuit to keep the arc lit at idle. You'll want the late model headlight ($70 that takes an H4 bulb. You'll also want the bi-xenon option, which adds $49.99 to the price, because otherwise the high beam is a 60 watt halogen, which will kill the battery. Verify the ballast is waterproof before spending any money.