exactly and they wont run past 7psi without tune unlike SR20 where as you can run 15 psi of fmic of course without tune. SR is made for boost but im sure lots of KA whores will come in here and say otherwise but tell me this. how come everyother country in the world got SR and CA and USA got a truck motor ( weather you like it or not thats what it is ) explain that and id rather have a motor that will run 450++ whp on a stock motor with out having to work the hell out of internals.