Do these bars clamp to factory roof rails?

Yes—they mount at factory attachment points. No drilling or permanent modification. Exact clamping hardware is included; tightening specs depend on your vehicle, so check your owner's manual for torque values.

Can I load the cargo box right away, or does it need prep?

The box ships ready to use. No painting or sealing required. Wipe it down before your first load if you want to remove any transport dust.

What if the box doesn't fit my roof bars perfectly?

This set is designed as a complete pairing, but test-fit the box on the bars before your first drive. If alignment is off, verify the bars are seated flush at all mounting points—a common culprit is uneven clamping tension.