Quick view Airaid Airaid 10-14 Ford Mustang Shelby 5.4L Supercharged Direct Replacement Filter - Oiled / Red Media - 860-399 Compare $89.99 This AIRAID Direct-Fit Replacement Filter is a drop-in replacement for your vehicle's stock paper air filter that is designed to improved horsepower and acceleration. The air filter is constructed with multiple layers of filter media and provides... Add to Cart Add to Cart