Do these over fenders require drilling into my factory fenders?

No — these are designed to use your vehicle's existing factory mounting locations. Simply align the panels with your original bolt holes and fasten. Check your vehicle's service manual for the correct fastener type and torque specifications.

What should I do before painting these panels?

Sand and prep the FRP surface thoroughly to ensure proper paint adhesion. Since these ship in raw FRP condition, you have full flexibility with your primer and topcoat choice. Work with your chosen paint supplier to confirm compatibility with FRP substrates.

Will these affect my wheel well clearance or tire fitment?

These panels extend outward from your factory fender line. Verify your tire size and wheel offset against the added width before installation to confirm adequate clearance on your setup.