Dorman 598-166 EGR Line

Dorman 598-166 EGR Tube for Ram Diesel Applications

Dorman 598-166 is a direct replacement exhaust gas recirculation tube built for the original EGR routing on select Ram trucks. It is made from stainless steel and engineered to resist stress fractures, corrosion, and carbon buildup that can restrict exhaust gas flow.

Compatible With 2007-2012 Dodge Ram 2500, 2007-2010 Dodge Ram 3500, 2011-2012 Ram 2500, 2011-2012 Ram 3500, and 2011-2012 Ram 4000 applications.

• Stainless steel construction for durability in high-heat exhaust environments
• Direct replacement layout for the original equipment EGR tube
• 18-inch length with 0.25-inch inside diameter and 0.25-inch outside diameter
• Threaded end 1 and 2 connector points for OE-style routing
• Built to match the original tube’s features and component layout

Detailed Product Overview

This exhaust gas recirculation line is intended to restore the factory EGR path on Ram 2500, Ram 3500, Ram 4000, and Dodge Ram 2500 or Dodge Ram 3500 diesel applications listed in the fitment data. Dorman 598-166 cross-references OE and aftermarket numbers including 4980324, 68038087AA, and Standard Ignition ETB91 for the same application. The stainless steel tube helps address common failure points associated with heat cycling, corrosion, and internal carbon accumulation.

Common Problems This Part Can Address

• Cracked or stress-fractured EGR tubing
• Restricted exhaust gas flow from carbon buildup
• Corrosion damage in the original EGR line
• Leaks at the EGR tube connection points
• Check engine concerns related to EGR flow faults

Installation Notes and Tips

Verify the vehicle year, make, model, and EGR routing before installation. This part uses two connector points and a threaded end 1 design, so inspect the mating surfaces and threads for wear, carbon, or damage before assembly. Mounting hardware is not included. Confirm clearance around the exhaust and EGR components during installation on Ram 2500 and Ram 3500 trucks.

Quality Assurance

Dorman manufactures this EGR tube as a direct replacement part with OE-style fit and function for the listed applications. The stainless steel construction and application-specific design support consistent replacement of the original exhaust gas recirculation line.