Do I need factory fender flares to install these?

Yes. These rear add-ons are engineered to mount to the factory fender flare option. If your vehicle does not have them, you'll need to purchase and install flares before mounting these diffusers.

What condition does this ship in, and can I paint it right away?

It Requires Surface Prep. You can sand, prep, and paint immediately after installation—no stripping or initial sanding required beyond standard pre-paint surface cleaning.

Will this affect bumper removal or maintenance access?

These bolt to the fender flares, not the bumper itself, so bumper service remains unobstructed. Installation does not interfere with existing rear suspension or exhaust clearance.