The Stihl 11166403200 is a genuine OEM oil pump designed to provide consistent lubrication for the guide bar and saw chain on compatible Stihl chainsaw models. This essential component ensures the longevity and efficient operation of your chainsaw by maintaining proper oil flow. Manufactured to Stihl's high standards, it guarantees a precise fit and reliable performance, crucial for demanding cutting tasks. Regular maintenance and replacement with genuine parts like this oil pump help to prevent premature wear and extend the life of your equipment.