Dorman 674-491 Exhaust Manifold - Right

Dorman 674-491 Exhaust Manifold

Dorman 674-491 is a standard replacement exhaust manifold for the right side of select Ford and Lincoln applications. It is cast iron for durability and is engineered to match the original fit and function on the specified vehicles, including the Ford F-150 and Lincoln Navigator.

Key Features

• Cast iron construction with a metallic gray finish
• Round port shape with a 33 mm collector port diameter
• Standard replacement design for OE-style fit and function
• 11 mounting holes for proper alignment on the engine side
• No oxygen sensor port, heat shield, or gasket/seal included in the manifold body
• Includes manifold-related gaskets for a complete repair package

Detailed Description

This exhaust manifold is built for the right side of 2018-2020 Ford F-150 and 2018-2021 Lincoln Navigator models without ceramic coating. Dorman 674-491 is made from cast iron to handle exhaust heat and maintain structural stability, while its OE-style geometry supports a direct replacement on the listed applications. The part number 674-491 is also referenced by 662986, JL7Z9430A, and JL7Z9430B for the same application.

For buyers searching for a right exhaust manifold for Ford F-150 2018-2020 or Lincoln Navigator 2018-2021, this part provides a fitment-specific solution that follows the original manifold layout. The Dorman 674-491 exhaust manifold is a practical choice when replacing a cracked, warped, or leaking manifold on these vehicles.

What It Helps Repair

• Exhaust leaks at the manifold flange or gasket surface
• Ticking or tapping noises from a cracked manifold
• Loss of exhaust sealing on the right side of the engine
• Heat-related manifold distortion on high-mileage vehicles
• Failed emissions or drivability concerns caused by exhaust leakage

Installation Notes and Tips

Verify right-side fitment before installation on the Ford F-150 or Lincoln Navigator listed above. Check the cylinder head and downpipe sealing surfaces for damage, and replace worn fasteners or damaged hardware as needed during service. Confirm that the vehicle is not equipped with ceramic coating, since this part is listed for applications without ceramic coating.

Quality Assurance

Dorman manufactures this manifold as a precision-engineered standard replacement part to match the original fit and function on the specified vehicles. The included gaskets support a complete exhaust repair on the listed applications.