CYEFI Fuel System Parts. Barrel and Plunger Assembly. Diesel Engine Spare Parts. 6PCS Fuel System Parts Fuel Injector Oil Cup 3676985 for Cummins Diesel Engine. Engine Type::Diesel engine. Applications:Heavy duty truck, buses, engineering machinery, mining machinery, petroleum machinery, railway machinery. Port machinery, stationary and mobile diesel generator set power stations, Marine propulsion unit and auxiliary power unit. ? Item Con dition Items must be unused, in original condition, with all accessories included.