CUMMINS QSX11.9, (GOOD USED) 2012 Cummins QSX11.9 Diesel Engine Rear Main Seal Housing, for sale!!!! OEM P/N: 2870122 CM2250 Stock #: EB1126 For more information about this listing, shipping, technical questions email us at sales@jjrebuilders.com or call 1-800- 971-3019.