Dorman 674-943 Exhaust Manifold - Left

OE-Style Exhaust Manifold Replacement

Dorman 674-943 is a cast iron exhaust manifold built to match the fit and function of the original part on specified Ford Super Duty and Excursion applications. It includes the gasket and downpipe hardware needed for a complete repair, making it a direct solution for left-side exhaust manifold service.

Compatible With 2003-2007 Ford F-250 Super Duty, left; 2003-2007 Ford F-350 Super Duty, left; 2003-2005 Ford Excursion, left; 2004-2005 Ford E-350 Club Wagon, left; and 2004-2010 Ford E-350 Super Duty, left. This Dorman 674-943 manifold is built for vehicles that need a replacement matching the original mounting and port layout.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with round port shape
• Engineered to match original fit and function on listed vehicles
• Includes gasket and mounting hardware for the repair
• Left-side application for select Ford trucks and vans
• Cross-reference part numbers include ATP 101485 and OE numbers 3C3Z9431AB / 1840994C1

Detailed Description

The Dorman 674-943 exhaust manifold is a regular-grade replacement part designed for the left side of select Ford E-350 Super Duty, F-250 Super Duty, F-350 Super Duty, E-350 Club Wagon, and Excursion models. Its cast iron body supports exhaust routing at the cylinder head while maintaining the original port shape and mounting pattern. For buyers searching for a Ford F-250 Super Duty left exhaust manifold or a Ford Excursion left exhaust manifold, this part provides a direct-fit repair path.

This part cross-references ATP 101485 and OE numbers 3C3Z9431AB and 1840994C1 for the same application. The included flange gasket and downpipe hardware help complete the installation without sourcing separate sealing components.

Common Repair Uses

• Cracked or warped exhaust manifold replacement
• Exhaust leaks at the manifold-to-head sealing surface
• Broken or missing manifold mounting hardware
• Noise from leaking exhaust on the left side of the engine
• Failed sealing components during manifold service

Installation Notes

Verify left-side fitment before ordering and compare the original manifold, port shape, and mounting points to the replacement. Clean the mating surfaces thoroughly before installation, and inspect the downpipe connection for wear or damage. Use the included gasket and hardware during assembly, and follow the vehicle service procedure for torque sequence and fastener tightening.

Quality Assurance

Dorman manufactures this exhaust manifold to match original fit and function on the specified vehicles. The part is built from cast iron and supplied with the sealing and mounting components listed in the package contents for a complete repair.