CHRISTOPHER: So you have zero faith?
LORELAI: I’ve known you since I was six, Chris. You’re the guy that crashed his Porsche two hours after his parents gave it to him for his 16th birthday.
Porsche is a German car manufacturer specialising in sports cars, SUVs, and luxury sedans. It’s possible Christopher’s parents bought him a 1984 Porsche 924, a two-door coupe intended to be their entry-level model. It seems like an expensive but not totally reckless gift for a spoiled, rich teenager. In real life, Christopher wouldn’t have had his driver’s licence at sixteen, although I can imagine him just taking the car out anyway.
We learn here that Lorelai and Christopher weren’t just friends before they started dating, they were childhood friends, and have known each other most of their lives.