Though you think you might not pick up a whole lot of horsepower by changing to a K&N filter, you really can if you have the mods done as heads and cam. Gains such as 20-30 horsepower can be seen, getting your engine to breath is very crucial. Pick up a K&N filter if you're looking to free up some horsepower and increase your gas mileage on your Mustang, this is a great mustang part to add to your mod's list.
