K&N 01-04 Lexus IS300 L6-3.0L Performance Air Intake KitThe K&N 57 9018 FIPK air intake system replaces the restrictive factory air filter and air intake housing in some Lexus IS300 models. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your IS300's 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 9018 air intake