Intake System Design
Air intake systems serve several important functions. Primarily, they are used to increase the amount of oxygen available to the engine and reduce air turbulence increasing power. Because cool air has greater density than hot air, aftermarket intakes improve combustion of fuel by capturing cooler air from outside the engine compartment. In addition, an aftermarket air intake system increases the diameter of the intake as compared to the original equipment, increasing air flow into the engine and making more oxygen available during the combustion process.

By designing a more direct route for the air entering the engine, as well as a smoother interior surface for the intake, air resistance is reduced and air flow is increased. To protect the engine from damaging dirt, cold air intakes are also equipped with filters. Air intake systems can improve gas mileage and increase performance, and they also add a sleek, custom look to a vehicle.

Review the Ford Powerstroke Injen Install Guide.

Done looking?  Buy the Injen for Powerstroke.