Do these vents actually pull air through, or are they just cosmetic?

These are functional vents designed to route airflow across the hood surface. They're not sealed dummy panels. Actual airflow depends on hood gaps, underbody airflow design, and driving speed — verify your vehicle's air intake path before installation to confirm how effectively they'll vent heat to your specific setup.

Will the clear coat scratch or need refinishing?

Real carbon fiber with clear coat is durable, but like any exposed finish, it responds to normal car care. Wash with soft cloth, avoid harsh compounds, and wax periodically to maintain protection. If the clear coat does get light scratching over time, polishing compound designed for clear coats will restore gloss.

How much lighter are these than the factory vents?

Carbon fiber is significantly lighter than factory plastic or metal components. Exact weight savings depend on factory vent construction, but real carbon fiber will reduce unsprung weight on the hood. Every pound counts for brake performance and handling.