K&N 00-02 Lincoln Navigator V8-5.4L DOHC Performance Intake KitThe K&N 57 2558 FIPK air intake system replaces the restrictive factory air filter and air intake housing in some Lincoln Navigator 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 2558 air intake comes