Do these bars need any prep work before I bolt them on?

Wipe down the contact points on your roof rails with a dry cloth before mounting. The bars arrive ready to install — no paint or coating work required.

Will these work with third-party cargo boxes and baskets?

Yes. These cross bars mate with any standard roof accessories designed for rail systems. Check your cargo box footprint to ensure it spans both bars cleanly.

What hardware do I need to secure them to the roof rails?

Mounting hardware is not included in this kit. You'll need to source bolts or clamps that fit your vehicle's roof rail system — check your owner's manual or visit a Toyota dealer for the correct fastener size.