Try it, before you decide you want to boost it that much!
If your intention is to race it, yes, the extra 80 ponies will be amazing, but really, for daily use, it is pretty zippy. Not jaw dropping, but with the electric motor providing torque right from idle, you don't miss the power that much (and mine is a CVT!). Raw power is really not what this car is about. It is a package of economy, reasonable performance, and good handling.
You can get some modest gains from intake and exhaust modifications, which are relatively cheap and easy to do. if you do more than that, you will have to upgrade the brake and suspension too.
In my opinion, the best and cheapest performance mod you can do is the "passenger delete". The effective horsepower gain of shedding 150 pounds or more, is pretty substantial for a car like the CR-Z.
Take a CR-Z for a lengthy test drive, before you spend a long time pondering an expensive and involved modification like cranking 200 HP out of it.
That's my $0.02 anyway.
Edited to add- if you add too much power, you will pull away from the ligts too fast to enjoy all the looks from other drivers interested in what it is you are driving!