(Used) 2018 Peterbilt 579, DPF STEP- Part Number: M22-6208-001, Material: Aluminum, Dimensions: L=42", H=24", 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