Dorman 904-331 Fuel Injector Line

Fuel Injector Line for Ram 2500 and 3500

This Dorman fuel injector line is a direct replacement for specific Ram diesel applications, built to match the original line’s fit and design. Dorman 904-331 is engineered for the fuel system demands of 2007-2010 Dodge Ram 2500 and Ram 3500, plus 2011-2018 Ram 2500 and Ram 3500 models at cylinder 1.

Key Features

• Direct replacement fuel injector line for cylinder 1 applications
• Steel construction with a silver or gray finish
• Female inlet and female outlet connections
• M14 x 1.5 inlet thread and M18 x 1.5 outlet thread
• Metric coarse thread type for OE-style connection points
• Rated for high-pressure fuel system use up to 29,000 PSI
• Fits 2007-2010 Dodge Ram 2500, cylinder 1
• Fits 2007-2010 Dodge Ram 3500, cylinder 1
• Fits 2011-2018 Ram 2500, cylinder 1
• Fits 2011-2018 Ram 3500, cylinder 1

Detailed Description

Dorman 904-331 is a replacement fuel injector line for the fuel injection system on select Ram heavy-duty trucks. It is precision-engineered to follow the original line’s fit and routing requirements, helping maintain proper connection at the injector and related fuel system points. The steel line measures 7 inches in length and uses a 0.142 inside diameter with 0.087-inch wall thickness for high-pressure service. This part cross-references Monroe Shocks & Struts (e.g., 68005437AA) for the same application.

Common Problems This Part Can Address

• Fuel leakage at a damaged injector line connection
• Cracked, corroded, or fatigued fuel line material
• Improper sealing at the injector or rail connection
• Hard starting caused by fuel delivery loss at cylinder 1
• Fuel system pressure loss from a compromised line

Installation Notes and Tips

Verify the vehicle year, model, and cylinder location before ordering. This part is listed for cylinder 1 on 2007-2010 Dodge Ram 2500 and Ram 3500, and 2011-2018 Ram 2500 and Ram 3500. Confirm the M14 x 1.5 inlet and M18 x 1.5 outlet thread sizes match the original connection points before installation.

Quality Assurance

Dorman replacement parts are built to match original fit and design requirements for specific vehicle applications. This fuel injector line is intended for direct replacement use on the listed Ram models and is manufactured to support OE-style serviceability.