Will this bolt straight into my car without modification?

Yes. This assembly mounts at factory points with no drilling or bracket work needed. Unbolt the old unit and seat the new one in place.

Do I need to buy bulbs separately?

Bulb inclusion is not confirmed on this assembly. Check your current headlight to see what bulb type you're running, then source a replacement if needed.

What's your return window if this doesn't fit?

Test-fit before you commit. If there's a problem, contact support with photos of the mounting area and we'll work it out.