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, DIESEL PARTICULATE FILTER- (Inlet Facing Front, Outlet Facing Rear) INLET- Serial number: 26072100375, FILTER- Serial number: 36199185002, CPN: 2871461, EPN: Q629355, ASM- EPN: 205208A, CPN: 2866594, OUTLET- Serial number: 43106100104, Engine: Cummins ISB 6.7, 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 1T7YN4E25B1137943, 1T7YN4E25B1137943