2020 Peterbilt 579, Truck Tractor, I Beams, Fits to: Peterbilt 579, (Used) 2020 Peterbilt 579, AXLE BEAM- Make: Meritor, Model: MFS12E122CNN14, Material: Steel, Part Number: B05-6043-0C7100000, Serial Number: MON03848606, 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 2020, VIN 1XPBDP9X1LD640414, Axle Make Meritor 1XPBDP9X1LD640414