Genuine Honda | PCV Valve | Honda Civic Type R | FK2 / FK8 2.0T K20C1 | 2015-2021PCV (Positive Crankcase Ventilation) Valves control the build up of pressure within the engine crankcase and vent excess pressure typically to the intake manifold. Blocked PCV Valves typically cause excessive smoke from the exhaust and uneven idling. In addition excess crankcase pressure can cause early failure of piston rings and oil seals. As with all genuine Honda products expect perfect fit and performance every time. TECH SPECS Genuine Honda