Has anyone heard of the IPR Oil Cooler/High Flow Coolant filter setup? I did some research and it seems like a great idea. The external Oil cooler is mounted outside of the Valley of the engine bay and installed along your Frame rail or any other place you have room. They also now use the 6.7 Oil cooler for better performance and reliability.
Also, they sell a separate Coolant Filter kit where they claim to filter all the coolant before it goes into the Oil cooler.
Check out this video that does a step-by-step installation. It seems straightforward or at least much easier than an Bulletproof Oiler Kit install.