[Work Truck Fanatic]

More flow, at the expense of what....
Ford already has a CAI from the factory. A lot (not all) actually leak hot engine bay heat into the intake. Others, may flow more but may allow more particate through.
Also, you gotta get spent gasses out before you can really force more in. And use more air to do any good.

Just so I'm clear do you mean higher flow increases the chances for more particulates to enter the engine? I would think the filter (as long as it was from a quality brand) would just get dirtier faster. I can assume that particulates smaller than the micron rating of the filter would pass through. Am I on the right track... Hopefully those smaller particulates won't cause accelerated wear.

 

[Work Truck Fanatic]

Higher flow could mean more/ larger particulate pass through. On my non race vehicles I am extremely wary of aftermarket air filters. Many manufacturers claims are twisted. Some mention 99% efficient in ISOxxx testing. Which sounds great until you look at the testing and see that test is for particulate 15 microns and larger. But it is not always that way. Increasing the surface area of a filter will also increase flow. The obvious ways are increase the pleats and/ or the size of the filter. Take the stock filter as the "standard". You can increase flow by poking holes in it with a needle (decrease filtration) or you can fabricate a hole on the back of the airbox and add a 2nd OEM filter (same filtration efficiency, more surface area/ more flow).
That is a simplified explanation. Point being, choose your filter wisely. Make sure the ISO testing is the same as against an OEM filter.

Thanks for the info. I see your direction now. Yeah you have to be careful with the fine print.