the 9's are a colder plug. If your engine runs hot (like a turbo) engine, the plug will be able to remove / handle the heat better. You will run at higher temps with the 7's because they simpally cannot extract / handle the heat the 9's will.



hope that helps

just run 9s all around....its easier, slightly better, and you wont ever mix them up

has anyone run the racing 9's?

now what advantage would racing 9s be to me with a stock 7

nah i just run ngk 9's



well you have a T2 right?....if so read the thread man....freeman expalined it a whole lot and theres a ******* link...use ur brain this isnt the first time u asked a question about the obvious things that are right in front of you



- mike

i did read the thread i was following along what you guyz wer saying i never saw the link untill now