(Used) 1999 Mack, DIESEL PARTICULATE FILTER- (Inlet Facing Upward, Outlet Facing Inward) INLET- EPN: 17W02, CPN: 39892, Part Number: 21756506, Serial Number: 12400006598382, OUTLET- EPN: 12W22, CPN: 39892, Part Number: 21311953 Serial Number: 12400002552796, 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