Kubota 18430-11380 Separator, A/C (Air Cleaner Separator Plate) OEM replacement air cleaner separator for Kubota generators. Fits ARX4000, AV3800, AV4500, and AV5500 series models. This separator plate is a critical component of the air cleaner assembly, helping maintain proper airflow and engine performance by filtering contaminants before they reach the engine. Direct OEM part ensures compatibility and reliable operation. Essential maintenance component for keeping your Kubota generator running efficiently.