Welcome to the forum and congrats on your purchase. Best thing you can do is speak to your prospective tuner. Call a few (there's some in QLD that advertise on this forum) and explain exactly what you want. Depending on your tuner's choice in software you might have to purchase an xcal flash tuner. F6 CAI with a K&N filter, venom cat, fuel injectors, walbro intank pump and a tune is your best bet. Speak to your tuner about injectors as some prefer certain products. F6 CAI you should be able to get for $100. It's just the snorkel that you need. You can cut out the hole in the front of the standard XR6T airbox to fit it. A K&N filter wouldn't be bad either. The F6 intercooler doesn't flow a great deal more than the XR6T cooler. Your tuner may advise you not to bother with it. You should see some better economy after a tune. The standard tune's AFRs are pretty rich. Under drive pulley isn't something done on the turbos. Leave it for the N/As.