Is the PCV valve or the EGR valve not a part of the emissions system?

Both the PCV (Positive Crankcase Ventilation) valve and the EGR (Exhaust Gas Recirculation) valve are integral components of a vehicle's emissions control system. The PCV valve helps manage and recycle crankcase gases, reducing harmful emissions, while the EGR valve recirculates a portion of the exhaust back into the intake, lowering nitrogen oxide emissions. Therefore, both valves play crucial roles in minimizing pollutants and enhancing engine efficiency.