Will this bolt straight into my existing headlight location?

Yes. This assembly mounts at factory rocker points and uses the OEM bracket holes—no drilling or adapter brackets needed.

Do I need to replace the bulb, or does it come with one?

The assembly ships without a bulb installed. You'll use your existing bulb or source a replacement separately to match your vehicle's specification.

What's the return window if this doesn't fit or work?

Check the ModSupply return policy on your order confirmation—it covers defective units and fitment issues within the stated window from shipment.