aj is correct...

they did make97/98 tegs with the a/c not dealer installed either it depends on where you got your type r's from... if you live in say florida where it is mostly hot and sunny... dealers put in a request to have them preinstalled , to sell quicker, to make things easier for the dealerships etc....

ifyou bought one in california some dealerships got the same example... it just depended on which dealership had the most pull at what ever factory they were coming from....