i wanna get HIDs for my xd...but i have no idea what the bulb size is? can someone tell me?

We're an H4/9003 BiXenon am I right?

Hrm don't you normally want a headlight that takes advantage of the HIDs instead of the normal headlights? Sorry I don't know that much about HIDs+headlights.

Correct~! It's H4 Bulb. When you purchase the HID, make sure it's Bi-xENON. Which means that it can switch from Low beam to High beam, and high to low. Some Bi-xenon are fake, like only one Xenon bulb, and the High beam is still the Halogen bulb. Make sure it's Hi Low Beam are both HID~!

I am an HID idiot.

Could some kind soul point me to some information that would tell me what I need to buy in order to install HIDs into my 2008 xD? I've been reading www.hid-headlights.com, but Scion is not listed in their Application Guide.

Thanks!