Will this bolt straight onto my car without modification?

Yes. This assembly mounts at factory rocker points with no drilling or bracket work needed. You're looking at a true bolt-on swap.

Does the bulb come with this?

The assembly ships as a housing only. You'll need to source the bulb separately and transfer it from your old unit or grab a replacement.

What's the return process if it doesn't fit?

Test-fit immediately upon arrival. If alignment is off or mounting doesn't match your vehicle, contact support with photos and your order number for next steps—don't force it into place.