D2 Dura-Dry Filter for Hassle-free Replacement: The D2 Dura-Dry filter is designed to be disposable, simply replace the old filter with a new one and you're ready to go. Its advanced non-woven synthetic media delivers strong airflow while providing substantial protection by capturing dust and debris. Engineered for up to 30,000 miles of service under normal driving conditions, it offers dependable performance until it's time to replace. aFe POWER performance air filters use a rounded, evenly spaced pleat design which allows for more usable filter surface area, providing increased flow and greater dust holding capacity. This aFe POWER performance air filter is constructed with a polyurethane base and top. Unlike other materials that degrade after repeated heat cycles in an engine bay, polyurethane maintains its original molded shape.