Over 30 years ago S&B Filters started with a simple mission - to become a supplier of the most technically advanced high performance filter on the market. Their commitment to the race community allowed them to develop products that featured the incredibly high efficiency ratings and tremendously low air flow restriction. Features and benefits are: improved air flow with exceptional filtration, engineered to boost your vehicle's horsepower output & increase fuel economy, completely washable and reusable, million mile limited warranty, and it is emissions legal in all 50 states. Airflow Rating: 40.2% Better than the OE induction system at rated flow (527 CFM); Efficiency Rating: 99.24% more efficient - ISO Course Dust. FREE Shipping!