12mm Diesel Fuel Injector Lines For 3.9L 4BT Cummins Engine P7100 P-Pump

12mm Diesel Fuel Injector Lines for Cummins

These 12mm Diesel Fuel Injector Lines transfer high-pressure fuel from the P7100 P-Pump to the injectors on the 3.9L 4BT engine.

Overview

These 12mm Diesel Fuel Injector Lines are engineered to withstand the intense pressure demands of mechanical diesel injection systems. Technicians install these 12mm Diesel Fuel Injector Lines to restore reliable fuel delivery and engine timing on the 3.9L 4BT engine. Each of these 12mm Diesel Fuel Injector Lines features precision-bent tubing to ensure an exact fit for Cummins applications utilizing the P7100 P-Pump.

Built For Performance

• 12mm heavy-duty tubing diameter for consistent fuel volume.
• High-strength steel construction to prevent line expansion under pressure.
• Corrosion-resistant exterior finish to protect against engine bay heat and moisture.
• Precision-machined fittings for leak-free connections at the pump and injectors.
• Pre-bent geometry designed specifically for the 3.9L 4BT engine layout.

Fits These Machines

• for Cummins 3.9L 4BT Engine
• for Cummins P7100 P-Pump configurations

On-The-Job Use

• Replacing vibrating or cracked lines during a complete engine rebuild.
• Restoring fuel system integrity after a P7100 P-Pump service or installation.
• Ensuring precise fuel atomization by maintaining consistent line pressure.

Specs At A Glance

Good To Know

Q: Can these lines be used on a rotary pump engine? A: No, these lines are specifically bent and sized for the P7100 P-Pump and will not align with other pump types.

Q: Why is the 12mm thickness important for this application? A: The 12mm diameter provides the necessary wall thickness to handle the high injection pressures generated by the P-Pump without rupturing.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.