K&N 07-10 Dodge Nitro 4.0L V6 Performance Intake KitThe K&N 57 1556 FIPK air intake system replaces the restrictive factory air filter and air intake housing in some Dodge Nitro models. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. The 57 1556 air intake comes with