40-3099732 Injector line set, Hercules model D2300 engines.40 3099732 Injector line set, D2300 series Hercules diesel engine, This is a complete set of 4 injector lines from the high pressure pump to the injectors. Please study the picture and compare to your lines as there were several types of fuel systems used with the 2300 series diesel engines. This is a complete set and will not be separated.