2011 Thomas Built Saf-T-Liner HDX, School Bus, Diesel Particulate Filter (DPF), Fits to: Thomas Built Saf-T-Liner HDX, (Used) 2011 Thomas built Saf-T-liner HDX, DIESEL PARTICULATE FILTER- (Inlet Facing Upward, Outlet Facing Inward) INLET- EPN: Q629705, CPN: 2871752, FILTER- EPN: Q6293355, CPN: 2871461, OUTLET- EPN: Q629450, CPN: 2871527, ASM- EPN: A049N505, CPN: 4354225, Serial Number: 43229170107, Engine: Cummins ISB6.7 Reference images for condition. For more information about this item, give us a call. We ship worldwide! ( CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Truck Year 2011, VIN 1T7YN4E29B1137993, 1T7YN4E29B1137993