S&B replacement filters for S & B Cool Air Intake Systems. These replacement filters are for vehicles already equipped with a S & B Cool Air Intake System. These washable reusable performance filters are easy to install & maintain, and with proper maintenance will last the life of the vehicle. These gauze air filters mean More Air - More Power. Designed to give you more horse power. S & B filters are tested to ISO 5011 filtration standard. They are designed to stop 99%+ of the dirt and still flows better than the OE paper filter or comparable competitor products. Million mile limited warranty. Manufactured in the U.S.A. Tested to a Higher Standard. S&B has spent 30 years on research and development to bring the highest quality filters to market, and our test results demonstrate our success. Sample Test Results: The S&B Filter for the 2002 Dodge Ram 5.9L Cummins Diesel improves the air flow 40.3% compared to the OE Filter while stopping 99.68% of the dirt. Better air flow results directly in better performance and fuel economy.