Will these extensions clear a trailer hitch or rear-mounted accessories?

The diffusers sit below the bumper line and do not extend rearward past the factory bumper. Verify clearance with any aftermarket hitch or carrier you plan to use, as extensions vary in depth.

Are there any sensor or parking aid holes pre-drilled?

No. These arrive as blank FRP panels. If your vehicle has rear sensors or PDC units, you will need to carefully drill corresponding holes and test fit before final installation.

Do I need to paint these before installation, or can I install them unpainted?

Installation before paint is possible if you are careful during fitment. However, we recommend painting first to avoid chips and damage during mounting. The surface accepts paint directly without additional sanding once you're ready.