Dorman 674-987 Exhaust Manifold - Left

OE-Style Exhaust Manifold for Ford Super Duty

This Dorman exhaust manifold is precision-engineered to match the fit and function of the original part on specified vehicles. Built from cast iron with a natural finish, it is made for left-side applications on Ford F-250 Super Duty, F-350 Super Duty, Ford F-350, and Ford F-150 models listed below. Part number 674-987 includes the gaskets and downpipe hardware needed for a complete exhaust manifold repair.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with square port shape
• Includes gasket and seal components for the repair
• Mounting hardware included
• Direct-fit replacement for the left side
• Cross-reference: Ford BC3Z9431DA

Detailed Description

Dorman 674-987 is an exhaust manifold replacement engineered for OE fit and function on select Ford trucks. It is designed for the left side and uses a cast iron body with a square port shape to match the original manifold layout. This part number 674-987 is a practical choice for restoring exhaust sealing and manifold integrity on 2010-2022 Ford F-150, Ford F-350, Ford F-250 Super Duty, and Ford F-350 Super Duty applications listed in the fitment data.

Compatible With: Fits 2010-2014 Ford F-150, left; Fits 2011-2016 Ford F-350, left; Fits 2011-2022 Ford F-250 Super Duty, left; Fits 2011-2022 Ford F-350 Super Duty, left.

What It Helps Fix

• Exhaust leaks at the manifold-to-cylinder head sealing surface
• Cracked or warped original manifold housing
• Broken or corroded manifold mounting points
• Noise from escaping exhaust gases near the engine
• Failed sealing components at the manifold connection

Installation Notes and Tips

Verify left-side fitment before ordering and compare the original manifold, port shape, and mounting points to the replacement. The package contents include the exhaust manifold, manifold gaskets, studs, and nuts, which supports a complete repair. Inspect the cylinder head surface, fasteners, and adjoining exhaust components during installation to help ensure a proper seal.

Quality Assurance

This Dorman manifold is manufactured to match original fit and function on the specified Ford applications. Its cast iron construction and included sealing components support a repair focused on restoring factory-style exhaust performance.