RATING COLD AIR INTAKE NSB75-5053 '11-'13 F-SERIES 6.7L PSDResistance to Flow Testing: Flows 34.0% with the Cleanable Filter, 32% with the Dry Filter, better than the
stock intake when measuring just the resistance to airflow.Resistance to Flow while Dust Loading: Flows 14.6% with the Cleanable Filter, 19% with the Dry Filter, better than
the stock intake while loading the filter with ISO specified
dust.Efficiency Rating: 99.57% Efficient with the Cleanable Filter (Cotton
Filter), 99.54% Efficient with the Dry Filter (Cotton Filter) both @ 580 CFM (ISO Course Dust)
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