ITs located in the rear of the lower intake. You'll put the PCV filter screen into the hole first, then the PCV grommet into the hole, then the PCV valve connected to the PCV hose. I recommend you use brand new Motorcraft PCV parts for this as they are the best quality and you don't want to skimp on PCV (plus for all three it's only about $20 from a Ford dealer and aftermarket PCV stuff is crap.