IF you haven't already done so IMO the absolute first thing / upgrade for any turboed car is to install a larger diameter MANDREL bent exhaust system from the turbine outlet that incorporates a "hot dog" resonator midway to eliminate droning as well as a straight thru muffler at the rear and please don't put a silly 5 inch tip on it
For your 2 litre I would use 3 inch diameter as I had on my car and had it dynoed before and after the same day and IIRC gained a 15% increase in power and torque due to it eliminating any backpressure post turbo thereby allowing the turbo to come on boost sooner and work more efficiently.
I would also recommend that you have the car remapped on a RR/Dyno for even better/safer end result and you won't stop

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IF you have it remapped on a dyno it is important that you get the injector flow figures @ WOT as it is generally considered that it should not be higher than 80-85% otherwise higher flowing injectors should be installed and the fuel pump may need to be upgraded as well for safety.