I have a 97 gt and i want to do the pi head swap and have just about every bolt on. I just bought the car the way it sits with all the bolt ons on it and its not nearly fast enough. i was wondering who has the best pi heads for the money. i want some that are ported and assembled. i was looking at the gtr high performance ad and they have a stage 2 head kit but i dont know anything about it. If anyone has done it or have some knowledge on who has the best assembled heads let me know.