I will be getting my GTA in one week and reading this thread has got me slightly worried.
I rang the only official alfa dealer in Perth, Australia and the response i got was pretty much i don't know what i'm on about.
Good thing he said was it would be covered by warranty if something was to go wrong but still bit worring he didn't know what a Q2 was..
i have 3 things to say:
1. will be awesome for you when you get your GTA.
2. find another dealer to look after your car, which will mean an Indie; if the dealer does not know what a Q2 is, then what good are they?! or perhaps you spoke with the salesperson? they may not know, but ensure the service manager knows!
3. don't count on warranty! ATECO have shafted a number of aussie alfisti with blown diffs; they will make the dealer download the car's backup data which can tell them how often the car has been 'redlined'; based upon this, they use their 'discretion' to determine - read 'PRESUME' - whether the car has been thrashed or not; well, it may have been, but if it's been redlined a lot, they will argue the car has not been looked after and will NOT provide full warranty; think what you like, but they are apparently very stubborn about this, and you would really have to FIGHT very hard to get 100% reimbursement; yet, some people have, but most people have not, and not without a fight (read: hope you have a good solicitor)
...but the message is, for peace of mind, AND for improved performance (very significant improvement), you 'must' plan to fit the Q2 as soon as you can afford it.