Do these spats require drilling or do they use factory holes?

These extensions are designed to bolt to existing rear bumper mounting points. Before installation, check your vehicle's OEM bumper structure to confirm hole locations and alignment — minor trimming or light modification may be necessary depending on your bumper condition.

What surface prep should I do before painting?

Sand the entire surface with medium-grit abrasive to remove the primer gloss and promote paint adhesion. Wipe clean with a tack cloth, then apply your chosen primer and topcoat. Do not skip sanding — skipping compromises final paint durability.

Will these interfere with my rear bumper or exhaust?

Spat extensions are shallow additions to the rocker and lower quarter panel area. They do not typically contact the bumper or exhaust system, but verify clearance with your specific bumper style and any aftermarket exhaust positioning before final installation.