Engines | Mounts, , CUMMINS ISB, Misc Engine Part, (GOOD USED) OEM CUMMINS CONNECTION AIR INTAKE PART # 3921836 FOR SALE, B SERIES INTAKE ELBOW, STOCK # 1815 | ALL OUR PARTS ARE TESTED AND SHIP PRIORITY MAIL! OVERNIGHT SHIPPING OPTIONS ARE AVAILABLE! CONTACT US FOR MORE INFORMATION!