It's located under the stock intake scoop on the upper intercooler pipe going to the intake manifold. It's quite simple, just pull out the old one and attach the new one (with a flange or whatever necessary). Make sure it works with the upper intercooler pipe pipe and you know which nipple to attach the boost pressure source to. A 20 minute job at max.
There are much more informative articles w/ pictures and stuff. Check out the how-to section.