When I made my similar fender well intake setup. I actually moved my AIT sensor down to where the hole in the fender well was and tapped into the PVC there for the sensor intake readings.

Here is a picture of mine when I did have it in there. I cut through the flashing to get to the tap I created and Gorilla glued a rubber gromet into the PVC so I could remove the sensor without issue when necessary.

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James Shafer 2003 GP GTX St. Louis MO
1.9 Modified Rockers, TOGs, 180 Tstat, PRJ 10.4 Wires, P/P Gen 3, SLP Ram Air Hood/Wizaired CAI, Gen 1 Spoiler, 3.5 Pulley, 18" TSW Mondellos w/ AGX Struts, SSC Gen II Springs