2017 Thomas C2 School Bus, VIN: 4UZABRDU9HCHP9634 with Cummins ISB 6/7 CM2350, ESN: 73943469. The last 2 of these I replaced injectors and fuel connectors. Used the fuel lines over. Torqued injectors and lines to spec. Start bus up in the shop and no leaks. Ta... Login to read more.