My buddy has a 99 GT with 330,000 miles on it and he has only put a intake on it cuz the egr melted it, other then that its never been touched and has never been driven nice either. his car is the reason i gave the grand prix another chance. all i ever had where the 88-96 body style and they where POS now i have two 99GTs one 2000 GT and a 97 GTP and i have never been so happy with a GM car in my life