so i noticed that the intake on my 98 gt is cracked and now i need to replace it. What I was wondering is if i want to get a better intake like the PI intake from the 99-04, will it only fit if I have the PI heads too or can I just put it on the the car the way it is now with the non-PI heads. Also if i have to have the PI heads is there other upgraded intake manifolds that will give me more hp without having to get the PI heads?