Hello My name is Erik Yunga and recently I traded my Nissan 350z for a mustang gt 2001 with a 99-04 Cobra motor. The car is fun but it needs some tweaks here and there. Im trying to find out what year my motor is because im getting alot of info from all the years and the differences between them. The past owner said that it was a 2000 engine but I dont think thats possible because the only 2000s cobra was a Cobra R I believe. And there wasn't a 2002 Cobra either. So I think that leaves me with 99,01,03, and 04. I just wanna know what year because the 03,04 was the best engine out of the years im pretty sure.