I'm going to be buying a turbo kit for 99 civic Si but wanted to safely boost at 6 psi. I heard that the greddy blue box was pretuned for this. I just wanted to know if you could buy say a drag kit or anyother kit and then hook up the blue box to it to run at 6 psi or will i need a boost controller? What is the best way at going about this?

 

you could , i think youd be better off runnin the hack if you were gonna go with a kit other than greddy .