aFe Pro 5R Air Filter Elements for 2005-2010 MUSTANG - 30-10121 Air Filter Elements Wall thickness is selected for

Wall thickness is selected for the application's RPM range and spring pressure requirements

and tuned internal valving for the specific application

Professional mounting and balancing with a quality tire package ensures optimal ride quality

These converters maintain the factory O2 sensor locations and operating parameters for trouble-free operation while reducing backpressure through the cat section

aFe Pro 5R Air Filter Elements for 2005-2010 MUSTANG - 30-10121 Air Filter Elements Wall thickness is selected forThis aFe Pro 5R drop in air filter element (part 30 10121) is a direct replacement for 2005 2010 MUSTANG that swaps out your restrictive OEM paper filter for a high flow performance alternative. It is one of the simplest upgrades you can make to your engine's air intake system, delivering sharper throttle response and measurable gains without any modifications. The Pro 5R uses progressively finer mesh cotton gauze layered between polyurethane frames