I fit the powerkit (first in North Italy) last april on my CT '05.
I totally agree with RC.
The car really change and not only for new brakes power.
The best improvement, IMO, is in steering sensetions.
The kit provides new front suspension and this really change the car.
OK, also the 50 HP but when you really need 500 hp then 450 hp in normal use ?
CT isn't a track car and on a highway 450 could be enough.
If you think to keep the car for, at least, 2 years, take the powerkit.
If You will change the car with the next facelift, save your money.
This is the question.
Powerkit's price is really "important" but, believe me, it's a really complete kit, not only a chip tuning with new breakes.
Bye