This is an authentic Subaru/Robin replacement part. The pipe knock is designed by the manufacturer for use in engines. This part is made of metal, and is generally placed in the edge of the crankcase where it connects with the main bearing cover. You may require a wrench when replacing this part. This item is sold individually.
This is an OEM part sourced directly from the manufacturer. The stem seal is commonly found in Subaru/Robin engines. This part is made of metal, and is placed on the valve stem to allow a precise amount of oil leakage to lubricate the valve stem as it slides in the valve guide. You may require a wrench when replacing this part. This item is sold individually.