Just curious about the old filer in the pic. Also wondering if it will fit the 2018 6.4 air box! I have a 2018 PW, when I went looking for a new filter, the WIX, Microgard and Purolator that crossed over and listed by application were about 1/2" "shorter" than the OEM 68190705AA which was factory installed. I bought the Fram CA 11960 from Amazon which measured the same as my OEM ! If you could give me the number from your "old" one or replacement, I will see if it will fit my truck. When it comes to air filters more is always better!!