Welcome to the forums, and the FMIC and exhaust ar ethe 2 first mods you should do.
First, the stock ic is a tube and fin design, carried over from the Eurospec turbo diesel. This IC heat soaks quickly, and cust your power down. an FMIC, itself will not create power for you, but will cool the charge air better, which creates more power.
The FMIC kits out there, use Bar and plate, which is more effective for cooling the charge air, and will be a great addition to the MSP.
The exhaust will show minimal gains, as the S pipe off the turbo is REALLY REALLY restrictive. The free flow of a larger exhaust will help, but not much until you replace the s pipe.
A boost controller I would not suggest, until you get some sort of engine monitoring, and or engine mgt. Too many people have popped motors recently, and I really do not suggest it.
