I ordered kit from dallas mustang , Ive been dealing with them , they seem to know their stuff pretty good , I ordered the NGK 7060 / TR5 and NGK 4177 / TR6 for it , I am going to try the stock heat range first TR5s , and if it pings at all I will switch it out to the colder ones , I have a good ear for detonation so I am not going to worry about the tune , Mike at dallas mustang said as long as I stick with the stock mass air which is already a 85 MM on the 02 GT and havent changed the plenum or any thing much except for the long tubes I have he said the tune they (Vortech/ superchips) do will be good enough to try it . He said if I experienced the least detonation or pinging then to take it straight to get it dyno tuned but thats a 3 hour drive and I must drive it to get it dyno tuned because nobody in my area does that kind of work . I am getting it dyno tuned eventually but I hope that the tune they do is pretty close . Atleast so I can drive it 3 hours to get it on the dyno .