Do these mount to the existing fender or replace it entirely?

These are over fenders — they bolt over your factory fender using the existing mounting points. No replacement needed. You may need to drill small registration holes depending on your preferred mounting style, but the factory structure stays intact.

What prep work is needed before painting?

Sand the surface with appropriate sandpaper to ensure paint adhesion, then clean thoroughly to remove all dust. Apply your chosen primer and topcoat following the paint manufacturer's instructions. FRP handles standard automotive finishes without issue.

Will wider fenders affect my wheel fitment or suspension geometry?

The 30mm extension per side provides room for wider wheel offsets and slightly larger tire diameters. Verify clearance between the new fender line and your tire sidewall at full turn and suspension droop before final installation. Factory suspension geometry remains unchanged.