Replaced some 20 year old Ferrari timing belts that should have been done 15 years ago.

This beat my previous record of 14 years. They should be done every 3 to 5 years depending on the expert you talk to, but these still looked fine. No cracking, and tensioners were still tight. The first two numbers on the belts are the production date, so these probably got replaced once at 5 years old and then never again.