I was wondering if it was possible to just put HID bulbs in the stock light housing, or if you needed some kind of conversion kit.

HID bulbs are made in different size to fit different housings so I would say yes to your question, but you also need an ignitor/ballast for the bulbs to work since they do not work like conventional halogen bulbs. A "kit" would work best if you do not want to source these parts separately, but remember that putting HID lights into non-HID housings will blind on-coming traffic.

Are you referring to the stock b13 headlight housings?

Are you referring to the stock b13 headlight housings?

yes, i am

I was wondering if it was possible to just put HID bulbs in the stock light housing, or if you needed some kind of conversion kit.

yea get a hid conversion kit from ebay and make sure it uses a h4 type bulb. that how mine is for my b13