Will this bolt straight onto my car without any modification?

Yes. This assembly mounts at the factory locations — no drilling, adapters, or brackets needed. Should be a direct swap if you're replacing an existing headlight.

Does the 9005 bulb come with this?

The assembly comes without a bulb. You'll need to source a 9005 high beam bulb separately and install it into the socket.

Can I paint or modify the housing?

The housing can be worked with, but test any adhesive or paint on a small area first to confirm compatibility with the hard panel material. Avoid submerging the assembly during prep work.