Dorman 674-323 Exhaust Manifold - Left

Dorman 674-323 Exhaust Manifold for Ford F-150

This Dorman exhaust manifold is engineered to match the original fit and function on select Ford F-150 applications. Built from cast stainless steel with an uncoated metallic gray finish, it is made for the left side of 2015-2025 Ford F-150 trucks and includes the gasket and downpipe hardware needed for a complete repair.

Key Features

• Direct replacement exhaust manifold for select Ford F-150 left-side applications
• Cast stainless steel construction for durability in exhaust service
• Round port design with 52.4 mm collector port diameter
• Standard replacement grade for OE-style fit and function
• Includes gasket/seal and downpipe hardware for the repair
• No oxygen sensor port and no heat shield included
• Eight mounting holes for proper alignment on the vehicle

Detailed Description

Dorman 674-323 is a replacement exhaust manifold for the left side of 2015-2025 Ford F-150 models. It is precision-engineered to match the original manifold’s fit and function, helping restore proper exhaust routing on the 3.5L and other specified F-150 applications covered by the vehicle fitment data. The cast stainless steel body, round ports, and uncoated finish support a service-ready installation on the Ford F-150 exhaust system.

This part cross-references Ford OE number FL3Z9431A for the same application. If you are searching for a Ford F-150 left exhaust manifold replacement, Dorman 674-323 provides the OE-style dimensions and included sealing components needed for a complete manifold repair.

What It Helps Fix

• Exhaust leaks at the manifold-to-cylinder head sealing surface
• Cracked or warped original manifold housing
• Broken or missing manifold-to-downpipe connection hardware
• Noise from escaping exhaust gases on the left side of the engine
• Failed sealing components during exhaust manifold service

Installation Notes and Tips

Fits 2015-2025 Ford F-150, left. Verify engine configuration, port alignment, and mounting-hole layout before installation. Inspect the cylinder head surface and downpipe flange for damage, and replace any worn fasteners or sealing surfaces as needed during service. Because this manifold does not include an oxygen sensor port, confirm sensor placement on the vehicle before ordering.

Quality Assurance

This Dorman exhaust manifold is manufactured as a standard replacement part to match original fit and function on the specified Ford F-150 applications. The included gasket and downpipe hardware support a complete exhaust manifold repair.