fuel Fuel Injection Line Kit With Clamps For Caterpillar 3406 3406b 3406c 1917941 New Posted on January 1, 2024 by admin 1 qty – #1 Fuel Line (OE # 7C3421, 4P9661, 1917941, 4P3921). Pistons & Rings Kit. 1 qty – #4 Fuel Line (OE # 7C3424, 4P9664, 1917944, 4P3924). 1 qty – #5 Fuel Line (OE # 7C3425, 4P9665, 1917945, 4P3925). 3406b 3406c caterpillar clamps fuel injection line