Save money on fuel and replacement filters. This revolutionary lifetime washable air filter can help increase fuel mileage by nearly 0.5 MPG. The design allows for more air flow than traditional air filters. Fits trucks with dual, exterior, air filter. Only needs washing every 50,000 to 75,000 miles under normal conditions. Re-oil after each wash. 30 day manufacturer's money back guarantee and lifetime manufacturer's warranty. Replacement filter for Fleet Air FA3539, Baldwin RS3539, Fleet Guard AF25247, Luber Finer LAF4816, Donaldson P534816, Wix 42971 and Napa 2971 air filters. These filters are usually found in Kenworth T800, W900L models, Peterbilt 367, 377, 387, 388 models, Freightliner Classic models, and Western Star.
Sold as a pair.

Price includes filters only. Klotz Oil, item 198709 is required for proper install. One can will re-oil 2-4 filters.