fuel 3406 Fuel Injection Line Kit Clamps for Caterpillar 3406B 3406C 1917941 1917942 Posted on December 20, 2023 by admin Fuel Line (OE # 7C3421, 4P9661, 1917941, 4P3921). Fuel Line (OE # 7C3422, 4P9662, 1917942, 4P3922). 1 qty – #1 Fuel Line (OE # 7C3421, 4P9661, 1917941, 4P3921). 1 qty – #2 Fuel Line (OE # 7C3422, 4P9662, 1917942, 4P3922). 3406b 3406c caterpillar clamps fuel injection line