More important to me, is how much dirt and crap is passed through the filter into the engine. Ait flow alone is just not as important as engine life from filters stopping the crud we see on an old filter.
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Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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