Two modifications have been made to the air intake system. I installed a high efficiency K&N air filter and removed the air intake silencer cone. The air filter, (catalog number E-0945), was $48 at Checker Auto Parts and was a very simple install. The removal of the silencer boot was also quite simple and created a considerably larger aperture for air flow into the air filter's chamber. Mustang enthusiasts feel that these two modifications can result in an improvement of 5-8 horsepower.
    K&N Air Filter
    Silencer Boot