As Phil mentioned.

My 2.0 Focus has- Stainless Mongoose exhaust, K&N cone, Cat Cams and it made give or take standard power, doing 137bhp (the cams i had fitted made no gains at first when tested) THEN i took it to Jamsport. Jamie remapped the stock ECU to make the most of the new cams and it transformed the car, giving 160bhp and 150lbs.ft.

It made it far better to drive in every way and feels much more pokey than the numbers suggest. For the amount of work and mods, i am well happy with it.

If i was going N/A for the nest step, i would consider bike carb conversion, just becuase it is a bit cheaper and tuning N/A is always pricy. If wanting more than 190-200bhp, as said....look at turbo, it just works out so much better on the pocket for the gains you will see.