Fits valve covers with 1.25" holes when using grommet
Use R4996 or R9358X grommets
PCV means "Positive Crankcase Ventilation" - where the gas fumes are sucked out of your crank case and fed back through the engine. Besides being eco-friendly it keeps your engine from giving off a bunch of smelly fumes. They might not be a bother running down the road but if you spend any time around the running engine you'll appreciate not getting fumigated.
This part fits most Cars and Trucks.; exceptions may apply. Please read the complete description to see if this part fits your specific vehicle and application.