congrats on the upgrade to pig sti. Great car and you will have heaps of fun with her. What colour and where did you pick her up from. The MY06 STI is the car I had previously until I traded her in for current Libo in June.
edit: oh and find the search button function here and then search for turbo back exhaust
tbe, verso, ecutek, etc. You will find heaps of threads on these for your particular car and avoid making mistakes that some of us pig sti owners made.