I was planing on running a 2.5 all the way, but i think my cai is 2.25. I have a LS let me know if this is corrcet. I am planning on running 20 psi. I know that if you go bigger the turbo will take long to boost, but what will happen if i stay with the 2.25.

 

as long as you have NOS and know how to double clutch you will be running 9's in no time. J/K, i would like to know too, as my CAI is 2.5"