Just buy the complete kit from Ron [MENTION=337]whoosh[/MENTION]. His price is less than the MSRP price of ATP. Plus he advertises "Free Shipping" for it too. Don't forget the blow off valve, since the kit does not come with one. Usually kit prices are a little cheaper than a la carte purchasing.
Before you purchase this, what are your goals. From what I've been told, if you want the down low kick of our stock turbo. It ain't happening with the bigger turbo, unless just high horsepower is your main objective. If you want that down low torque and moderate additional top end power, around 280-290ish WHP, then a hybrid is for you. Also if big HP is your goals, don't forget the auxiliary fuel system or meth injection to get there.