What wheel and tire clearance does this add?

The GT3 profile extends the fender line outward to accommodate wider wheel offsets and larger tire sidewalls typical of performance setups. Verify your specific wheel diameter and offset against the OEM fender opening before final fitment—the extended lip clears most modern track wheel packages, but your suspension geometry and ride height will determine your exact ceiling.

Will I need to drill holes or modify the existing fender structure?

These bolt to your existing fender mounting points using factory hardware locations. No drilling required on the vehicle itself. Confirm your OEM mounting hole pattern matches the flare design by comparing the bracket positions before installation.

What prep and finish should I apply to the carbon fiber?

Sand the surface with medium-grit abrasive to promote adhesion, then wipe clean of dust. A UV-protective clear coat is recommended to maintain the finish and prevent oxidation over time. Apply your chosen topcoat system according to the manufacturer's specifications for best results.