aFe POWER Magnum FLOW OE Replacement Inverted Replacement Filter (I.R.F.) with Pro 5R Media leverages the benefits of a conical air filter in a flat panel format, providing maximum airflow for performance-minded drivers. This innovative design utilizes a progressive 5-layer oiled cotton gauze media to ensure optimal airflow while maintaining high filtration efficiency. The inverted structure maximizes surface area for extended service life, while the precisely engineered polyurethane frame features a progressive bump seal, ensuring a perfect fit in the factory airbox and preventing filter deformation under load.