Back in 01 or 02, a guy on thedeiselstop.com teamed up with Gail Banks to test 10 top filters for CFM on the 7.3PSD. K&N was one of them.
The test results showed the the stock Motorcraft pleated filer, FA1750, out preform all the filters tested for CFM at approx 850cfm if I remember correct.
K&N came in 4th from the bottom for CFM.
K&N also has a known gasket leak as it doesn't fit the stock air box very well. K&N supposed fixed this in 2004 but they still found leaks after that time.
There was another test preformed by the DMax group. Once again K&N finished near the bottom in both CFM and particulates.
It's pretty hard to beat a pleated air filter. Many have tried but most have failed.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let�s make one more addition to our series on hydraulics. I�ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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