Do these require factory mounting point modification?

No. These over fenders are designed to bolt directly to existing factory attachment locations. Before installation, verify your vehicle's factory mounting hole positions align with the panel fitment.

What prep is needed before painting?

Sand the surface with 220-grit or higher to promote paint adhesion, then clean thoroughly to remove dust. Apply your choice of primer and topcoat following the paint manufacturer's specifications for plastic substrates.

Will these panels affect tire clearance or suspension geometry?

These are bolt-on over fenders that sit above the factory body line. Verify clearance between the panel's inner edge and your tire at full compression and full turning lock before final fastening.