Will I need fasteners beyond what's in the box?

You'll need bolts, washers, and lock nuts to secure the boards to the factory mounting points. These don't come with the assembly—grab stainless hardware from your local hardware store to avoid corrosion.

Can these mount without drilling into the body?

Yes. These use factory mounting points, so no holes needed in the frame or panels. Test-fit first to confirm your vehicle's attachment points line up cleanly with the board bracket positions.

Do I need to prep or seal these before installation?

Not required. Aluminum naturally resists oxidation, but if you're installing in a high-salt environment, consider a clear coat or automotive sealant on the underside to extend longevity.