I am looking at getting the ARB bumper for my GX460. I am thinking the correct kit for this is 3421780. I see sold here:
www.mainlineoverland.com
What confuses me as I have not found a build thread using this bumper. How does one deal with the old plastic pieces in green? Does one cut up your old bumper for it or something else?

ARB 2010-13 Lexus GX460/Prado 150 Deluxe Bull Bar - Suits Parking Sensors #3421780
Unlike most brush guards and bumpers, ARB Bull Bars incorporate a fully engineered mounting system which completely replaces the factory bumper. ARBs Deluxe Bull Bar selection is the most extensive. Loaded with features aimed at making remote area travel safe, no other bumper offers the same...
What confuses me as I have not found a build thread using this bumper. How does one deal with the old plastic pieces in green? Does one cut up your old bumper for it or something else?