Dorman 674-399 Exhaust Manifold - Left

Dorman 674-399 Exhaust Manifold

Dorman 674-399 is a cast iron exhaust manifold engineered to match the fit and function of the original manifold on specified vehicles. It includes the gasket and downpipe hardware needed for a complete repair, making it a direct replacement for left-side applications on select Ford and Lincoln trucks and SUVs.

Compatible with 1997-1998 Ford Expedition, left; 1997-1998 Ford F-150, left; 1997-1998 Ford F-250, left; and 1998 Lincoln Navigator, left. This part cross-references ATP 101177 for the same application.

Key Features

• Cast iron construction for exhaust manifold durability
• Natural finish with round port shape
• Direct-fit replacement for the original manifold on listed vehicles
• Includes gasket and mounting hardware for the repair
• Package contents: exhaust manifold, manifold gasket, bolts, and nuts
• Part number 674-399 for easy identification

Detailed Description

This exhaust manifold is built for left-side service on 1997-1998 Ford Expedition, 1997-1998 Ford F-150, 1997-1998 Ford F-250, and 1998 Lincoln Navigator applications. Dorman 674-399 is precision-engineered to match original fit and function, helping restore proper exhaust routing and sealing at the cylinder head. The cast iron design supports long-term durability in a high-heat exhaust environment, while the included gasket and downpipe hardware help complete the repair with the correct sealing components.

For buyers searching for a left exhaust manifold for 1997-1998 Ford F-150, left exhaust manifold for 1997-1998 Ford Expedition, or a replacement exhaust manifold for 1998 Lincoln Navigator, this part number 674-399 provides a direct OE-style solution. It also cross-references Dorman 674399, F75Z9431DB, ATP 101177, and SKP SK674399.

Common Repair Uses

• Exhaust leaks at the manifold-to-head sealing surface
• Cracked or warped original manifold housing
• Broken or missing manifold mounting hardware
• Noise from escaping exhaust on the left side
• Failed gasket sealing at the exhaust manifold connection

Installation Notes and Tips

Verify left-side fitment before ordering and compare the port shape, mounting points, and outlet configuration to the original part. Clean the cylinder head sealing surface thoroughly before installation, and inspect the downpipe connection for wear or damage. Use the included gasket and hardware during assembly, and torque fasteners to the vehicle manufacturer’s specifications.

Quality Assurance

Dorman manufactures this exhaust manifold as a regular-grade replacement part designed to match original fit and function on the listed Ford and Lincoln applications. The cast iron construction and included sealing components support a complete repair for the specified vehicles.