Air Intake Filter

The AFE POWER Air Intake Filter (model 21-91044) is a high-performance replacement air filter element designed for automotive enthusiasts seeking improved engine breathing and airflow efficiency. Built as a direct replacement for OEM air intake systems, this conical-style filter addresses the fundamental need for cleaner, unrestricted air delivery to the engine while maintaining effective particle filtration. Mechanics and tuners recognize that air quality directly impacts combustion efficiency, throttle response, and overall engine performance—making filter selection a critical component of any intake optimization strategy.

This Magnum FLOW Pro DRY S filter element features a synthetic construction engineered to capture contaminants while minimizing restriction compared to standard paper filters. The conical design—with a 9-inch base diameter tapering to 6.75 inches at the top and standing 7.5 inches tall—maximizes surface area for extended service intervals and superior dirt-holding capacity. The dry synthetic media requires no oil saturation, eliminating maintenance complexity while providing consistent filtration performance across varying driving conditions and climates. Its clamp-on design with a 5-inch flange accommodates most aftermarket and OEM intake tube configurations, ensuring straightforward installation without adapter fittings.

This filter suits both street-driven vehicles and performance builds where owners prioritize responsive throttle feel and reliable air filtration. Installation requires no special tools—the clamp-on flange secures directly to your existing intake tube, taking roughly 15 minutes for most applications. Weighing 2.45 pounds and measuring 9.1 x 9.1 x 11.1 inches, it fits compact engine bays while delivering measurable improvements in air delivery. Regular visual inspection and replacement every 15,000–25,000 miles (depending on driving environment) keeps your engine fed with clean, high-volume air and maintains peak performance efficiency.