Restriction can exist BETWEEN an air filter and the engine. This is the weakest link in the airflow "chain" and robs a vehicle of its natural horsepower. Often that weak point is the factory air path leading to the Engine. K&N air intake systems virtually eliminate air path restriction by replacing the air filter and the entire air path to the engine. The aerodynamically engineered tube drives a massive amount of air into an engine, which translates into POWER. The 57 Series Gen II Air Intake Kits are built for many different vehicles and represent a dramatic improvement over any O/E intake filter; they use only non-metallic rotationally molded tubes that can reduce air temperature and decrease intake sound over a metal tube.
Thanks to the Magnuson Moss Warranty Act: US Code – Title 15, Chapter 50, Sections 2301-2312, your vehicle’s factory warranty is protected by law when you add aftermarket parts.