AFE Power 21-91139 aFe Magnum FLOW Pro DRY S Air Filters American Force Rims Flatten corners

Flatten corners

Includes polyurethane bushings with grease fittings for noise-free operation and extended service life

8-inch rear axles found in 1990–2014 Mustangs

The rod is precision-ground and induction-hardened to resist bending under sideload

AFE Power 21-91139 aFe Magnum FLOW Pro DRY S Air Filters American Force Rims Flatten cornersThis aFe Pro Dry S drop in air filter element (SKU: afe power 21 91139 afe magnum flow pro dry s air filters) is a direct replacement for vehicles requiring part number 21 91139 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 Dry S uses