This filter is a direct replacement for a K&N.It is the same design which uses multi-layers of cotton and spray oil as a filter media.I've compared both side by side and have determined this to be a better quality filter by way of construction.This filter replaced the standard paper filter used in a 1999 motorhome with a Ford V-10, 6.8 L engine.This in combination with a large flow master muffler using 3 inch inlet and outlet increased the fuel mileage by approximately 2 1/2 miles per gallon.This is a significant increase. This trip was taken from Santa Fe New Mexico to Detroit, Michigan using a cruise control at a speed of 63 to 64 mph on the freeway.Other observations include a feeling of increased horsepower and smoother operation.I do hope this helps you in your decision on whether to purchase a product like this.Please keep in mind that these filters require periodic cleaning and re-oiling to keep them working efficiently.This filter was a much better buy here on Amazon as it ended up costing about 40% of the cost of a K&N.This filter can also use the K&N cleaning kit for future maintenance.Click Here to see more reviews about: FRAM PRA8039 Air Hog Round Filter
Product Description:
FRAM engineers designed every hi-performance air filter to allow the engine to "HOG" all available air. The 4-layer cotton gauze material allows more than traditional disposable paper filters for better vehicle performance.
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