Depends on what you want to do with it ... after dropping it in, they have in the area of 180-200 HP. With all of the mods you can do, there's a number of 300 and I think even a 400 HP 2.3T running around Stangnet.
Well actually, to clarify....early non-intercooled models were usually around 160 stock, later intercooled engines were rated at 190. Course, with a boost controller, cold air intake, and 3" exhaust, you can easily bring those numbers up to 220-230 hp, possibly even more.
Yeah you can't buy one. You can make your own, or modify a cold air kit from another car. I kinda made mine, put two intake tubes together end to end and made a bracket to hold the VAM. Works pretty good.