what would i need to do an hid kit on my 04 cavalier.

This is a very popular question asked many times. You are going to need projector headlights or some modification to ur headlight assembly that will sheild the light from drifting above a certian level (not sure what it is)....

Basically this is so you don't blind the other drivers on the road. and i,m sure you don't want to take that chance because of the ultimate cost of that not to mention the tickets u,ll get. But thats just my feelings on it.