fuel For CAT Fuel Injection Line Kit for Caterpillar 3406 3406B 3406C 1917941 1917942 Posted on December 6, 2023 by admin 3406 Fuel Injection Line Kit 6 Pcs 1917941 1917942 1917943 for CAT Caterpillar. OE/OEM Part Number : 7C3421, 4P9661, 1917941, 4P3921,7C3422, 4P9662, 1917942, 4P3922. 1 qty – #1 Fuel Line (OE # 7C3421, 4P9661, 1917941, 4P3921). 3406b 3406c caterpillar fuel injection line