Pro DRY S Universal Air Filter

The aFe POWER 21-91020 is a universal-fit replacement air filter from the Magnum FORCE line, engineered for enhanced performance and ease of maintenance. It utilizes Pro DRY S media, a three-layer synthetic filtration system that is oil-free, eliminating the need for re-oiling after cleaning for maximum convenience. The filter's design features a rounded, evenly spaced pleat structure, which significantly increases the usable filter surface area. This allows for greater airflow compared to stock filters, contributing to improved engine performance. The construction includes full 360-degree urethane frames for durability and a proper seal, ensuring a precise fit. As a universal-fit component, the 21-91020 is designed to be adaptable to various intake systems. While it is a direct replacement for certain aFe POWER intakes such as the 54-83038R and 54-83038D, specific fitment for other applications may require professional modifications. Its dimensions are approximately 4" flange, 6" base, 4-1/2" top (inverted), and 6" height.