K&N 57-6002 Cold Air IntakeK&N 57 6002 Cold Air Intake The K&N 57 6002 FIPK air intake system replaces the restrictive factory air filter and air box in some older Nissan 300ZX models. K&N intakes are designed to dramatically reduce intake restriction and improve 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 6002 air intake comes