Do I need to sand and prime this before painting?

Yes. The diffuser Requires Surface Prep, meaning the surface is prepared for your primer application. Sand lightly to ensure proper adhesion, then apply your chosen primer and topcoat. This gives you full control over the final finish.

Will this rear lip fit with my factory bumper cover?

This is a direct rear-end replacement that integrates with the factory bumper opening. Verify your bumper's mounting points and lower-panel cutout dimensions match the Aspec design before ordering. If you've modified your rear fascia, confirm fitment with your body shop or measure against OEM reference points.

What hardware do I need to install this?

The diffuser ships as a bare panel. Fastener requirements depend on your bumper mounting system and whether you're using adhesive, hardware, or both. Consult your vehicle's service manual or have your installation shop confirm the fastener specification before assembly.