2012 TRW/Ross Other, Truck Tractor, Steering Gears, Fits to: Western Star 4900 SA, (Used) 2012 Western Star 4900 SA, STEERING BOX- Part Number: 4773303 Serial Number: 4648307 Make: TRW/ROSS, Model: TBD, Side: Driver Left Side, Material: Steel, 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 2012, VIN 5KJJALDR8CPBN4842, Serial# 4648307 5KJJALDR8CPBN4842