... 6CT8.3 engine valve seat 2. It is used with 6CT8 engine valve 3. One is valve with intake and exhaust Valve SeatRemarks: 1) We ... , belt tensioner, water pump, lubricating oil pump, engine valve seat, engine valve oil seal, engine valve guide, fuel transfer pump, and so on. We ... OUR COMPANYPISTON RINGCONNECTING ROD BEARINGBELT TENSIONER Cummins 6CT8.3 Engine Valve Seat 3908830 &3928174