Do these mount at the factory rocker points with no drilling?

Yes. These bolt directly to existing mounting points on the rockers — no drilling, no reinforcement welding required. Use the hardware specified in the installation guide for your specific model year.

Does the silver powder-coat need any prep before installation?

The bars ship with finish applied. No sanding or primer needed before mounting. If you plan to modify or touch up the finish later, clean the area with soap and water first.

What hardware do I need to install these?

Mounting bolts and brackets are not confirmed as included with this set. Verify against your model-year service manual or contact support with your VIN to confirm the exact fastener spec for your truck.