Honestly,
If you are looking for a "cheap" high flow filter setup, go find a factory air filter system, from the core support to the turbo, from a 6.0 PSD. The factory filter uses a Donaldson P603577 PowerCore Filter. I've read this filter setup is good to 500+ HP in a 6.0PSD, which push ~30PSI stock, even more when turned up. The filter itself will trap nearly 3 POUNDS of dirt before Donaldson says it's dirty enough it needs replaced.
Now, this thing is big, and the mount is incorporated into the drivers side battery tray, and sits between the radiator and the drivers battery.
Here it is in place:
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Here to get an idea of the assembly size:
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Here is the replacement fiter:
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How the filter medium actually works:
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The replacements filter is not cheap, but they last a really long time.......
If you need any more specific information, or measurements, or pictures of the setup I can take pictures of, or measure mine........