It simply replaces the stock one on the front of your fuel rail. Take old one off, put new fitting for fpr line on it, attach to fpr, then run the other line to return and set pressure with vacuum disconnected apparently, to get the pressure correct. That's what I hear anyway.
Basically, and also you won't be needing the stock j-tube, so you can block that off and bypass it by running the line right from the fpr to the return. The bracket lets you mount it to the shock tower if i am not mistaken.