If you compare the lower explorer intake to your stock one, you'll see that the #5 runner has a sensor in it and the Explorer doesnt.
This is what you need to drill and tap a hole for, I'm not sure of what size tap it is but you can figure that out after you pull the sensor out of your stock one.
I believe the sensor is the air charge temp sensor or ACT. I could be wrong though...
good luck with it, you'll love the intake (if you have any other mods that is)
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NMRA O/C 9516
NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft
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