Airaid Cold Air Intake System: Increased Horsepower, Superior Filtration: Compatible with 2003-2007 FORD (F250 Harley Davidson Super Duty, F350 Harley Davidson Super Duty, Excursion)AIR-400-131-1

Call it the Power Principle: Better breathing equals more horsepower and torque. In order to fully understand this philosophy, you have to get down to basics. Since an engine is essentially a giant air pump, improving the air flow efficiency creates more power. On most stock intake systems, the main air flow restrictions are the intake box, the actual air inlet to the box and the paper air filter inside. The best way to bolt on more horsepower and torque by improving air flow to a gas engine is with an AIRAID Intake System. All AIRAID Intake Systems are computer designed and dyno tested and tuned to extract maximum performance for each application.