K&N Performance Air Intake System (57S-6200) Volkswagen > Golf > MK4 > R32 We have seen many valves

We have seen many valves with this problem

and corrosion

Corrosion Protection: Coated surface extends brake disc life by preventing rust

top mounts included

K&N Performance Air Intake System (57S-6200) Volkswagen > Golf > MK4 > R32 We have seen many valvesThe K&N Performance Airbox is designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. Replacing the restrictive factory air filter and air box allows your engine to inhale more air than with the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. A fully enclosed injection molded air box connects to the factory air intake hose. The removable lid