Do these bars mount to the factory roof rails, or do I need to drill into my roof?

They mount directly to your factory roof rails using the attachment points Mazda built in. No drilling, no roof penetration—just bolt them on where they're designed to go.

What hardware comes with these bars?

The cross bars ship as bare aluminum. Fasteners needed to secure them to your roof rails are not included—verify what your factory rails require before installation.

Can I use these straight out of the box, or do they need paint or sealing?

Aluminum bars can oxidize over time if left unfinished. Many owners apply a clear coat or automotive wax to protect them. Test-fit first, then decide on finishing based on your climate and preference.