Magnum FORCE Intake Repl acement Air Filter

The AFE POWER Magnum FORCE Intake Replacement Air Filter (Model 21-91064) is a high-performance intake filtration solution engineered for automotive enthusiasts seeking improved engine breathing and airflow optimization. This conical-design filter element replaces restrictive OEM air filters with a synthetic construction that balances filtration efficiency and minimal restriction, making it ideal for daily drivers and weekend tuners who want measurable gains without the complexity of full intake system modifications.

Built with a synthetic media composition, the Magnum FORCE filter delivers superior dust-holding capacity and extended service intervals compared to paper alternatives, translating to longer periods between cleanings and lower ownership costs. The tapered conical geometry—9-inch base diameter tapering to 6.75 inches at the top—maximizes surface area for air passage while maintaining structural integrity under boost conditions, reducing intake restriction by up to 20 percent in typical installations. The 5-inch flanged mounting surface (clamp-on design) ensures secure seating and straightforward installation, while the 7-inch height accommodates most modern engine bay configurations without requiring custom ducting or complex fabrication.

This universal filter element suits street applications where stock filtration limits airflow potential—particularly beneficial for turbocharged, supercharged, and naturally aspirated engines running performance tune software that demands cleaner, higher-volume air charge. Installation is straightforward: unbolt the OEM air filter housing, swap the element using the secure clamp collar, and reseal—no special tools or professional installation required. The white synthetic media provides visual inspection capability, allowing quick assessment of filter saturation levels during routine maintenance checks.