I have a catz hid kit in my 99 si and one of my bulbs blew recently. I was looking into replacing the bulbs but am not sure on the size of the bulb to get. I searched and am still not sure what size bulbs I would need.

THe kit is the 5200k low beam only kit for h4. I want to say d2r but I'm not sure. Also if anyone has any suggestions on where to buy some, let me know. I was thinking xenondepot but I haven't decided yet. Any help would be appreciated thanks!