Trinity Autosport sells FIA approved belts for your 997 GT3/GT3RS. What are FIA belts? FIA approved belts are labeled with an expiration date that is usually at least four years from the date of sale and most sanctioning organizations will honor that date. SFI belts are labeled with the date of manufacture and many sanctioning organizations require these belts to be replaced when that date is over two years old. This means that FIA approved belts may be less expensive in the long run. Check with your sanctioning organization to verify their current policy.