Do I need to sand and prep the surface before paint?

Yes. Sand and prep the surface before applying your chosen finish. This ensures proper paint adhesion and a clean final result. Your prep method depends on your paint system—consult your paint supplier for grit recommendations specific to your chosen primer and topcoat.

What fasteners or hardware do I need to install this?

The diffuser ships as a panel only. You'll need to source fasteners appropriate for your vehicle's bumper structure and mounting points. Check your OEM service manual or consult your installer to confirm bolt sizes and torque specs for your application.

Will this fit over my existing rear bumper, or do I need to remove it?

Most rear diffusers are fitted to the underside of the bumper assembly or directly to the frame/subframe. Verify mounting location and accessibility with your vehicle's service manual before beginning installation. Some installs require bumper removal; others do not. Confirm your specific setup in advance.