holding back

quick question, say i get full induction system, intake, headers catback, everything, does anybody think i would be restricted much if i kept stock intake manifold and catylic converter? if so how much and how much would it help if i upgraded?

yes, the stock cat will be a bottle neck. search, questions like this have been asked before.

it is impossible to say how much exactly it is restricted, and it is nearly impossible to say how much it would help if you upgrade unless you get it dynoed.