with the exhaust and pod filter you'd want to get it on a dyno before giving it too much of a hard time as they can cause problems if your car isnt tuned correctly for them... +1 for seeing mao and warrick at evo R.. my car had a similar problem when i got it, every now and then under full load i'd get a jolt and engine light... i thaught it was detonation but turns out it was due to the wastegate activating too early caused by a lazy tune.. ( good ol oz park race tune!) hahah now it never misses a beat, sounds awesome and goes like stink!
well done on getting an sti n not a wrx! you will not regret it if the plan is to go fast.
AAAAAND WELCOOME!