Functionality:Using good performance filter media to captures various debris. The air entering the engine cylinder is finely filtered to prevent dust and debris, ensuring a sufficient amount of clean air Advantage:Air Filter was designed to clean up exhaust so that the engine is less likely clogged by dirt. With a cleaner output, the engine is able to function that leading to a smoother and better horsepower.Material:Engine air filter built with good capacity media while providing smooth airflow, non-restricting airflow, to ensure optimal engine performance which improves vehicle miles per gallon.Compatibility:for Kia Optima EX, LX 2.4L L4 - Gas, 2.7L V6 - Gas 2004-2006, for Kia Optima LX, SE 2.4L L4 - Gas, 2.7L V6 - Gas 2002, 2003, for Kia Optima LX, SE 2.4L L4 - Gas, 2.5L V6 - Gas 2001, for Hyundai Sonata GL, GLS, LX 2.4L L4 - Gas, 2.7L V6 - Gas 2005, for Hyundai Sonata Base, GL, GLS, LX 2.4L L4 - Gas, 2.7L V6 - Gas 2004, for Hyundai Sonata Base, GLS, LX 2.4L L4 - Gas, 2.7L V6 - Gas 2002, 2003, for Hyundai Sonata Base, GLS 2.4L L4 - Gas, 2.5L V6 - Gas 1999-2001 OE Number:2811337101 Attribute:This is non-OEM product, accessory ONLY!Installation Steps:Direct replacement can be completed in 5 minutes without tools and modifications. replace engine air filter ensuring it is sealed around the perimeter, replace cover and fasten.Package Content:1 Pcs Engine Air Filter Kindly Know:Please check the compatible models and corresponding notes below the product description before purchasing.