With all due respect are you sure the car was 180 Bhp before you acquired it? Do you have the graphs to back it up? As im sure weve all experienced at some point people will say anything to sell a car.

The larger IC alone should see some power gain as the charged air will be much cooler, together with the cam you should expect more then 2 Bhp.

I assume you have had the car re-set up, and not just a power run? If you have any good tuner should be able to tell you where the problem lies, if they can't then that speaks for itself.....