Assuming this is the regular front bumper cover for the 3.0 & 4.4 (not the 4.8is front bumper)....here's instructions on how to remove/replace front bumper (facelift):
https://www.newtis.info/tisv2/a/en/e...bumper/BugrCqL
If a previous owner did an upgrade to the front bumper...there could be two pieces. The lower section of the 4.6is can be adhered to the front bumper of the 3.0 and 4.4 models to give it the "look" of the 4.6is front bumper. It would be #2 in the diagram below: