Dorman 674-334 Exhaust Manifold - Left

Dorman 674-334 Exhaust Manifold for Explorer and Mountaineer

Dorman 674-334 is a cast iron exhaust manifold built to match the fit and function of the original manifold on specified Ford and Mercury vehicles. It includes the manifold gasket and downpipe hardware needed for a complete repair, making it a direct replacement for the left-side exhaust manifold on select Explorer and Mountaineer applications.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with oval port shape
• Includes gasket and mounting hardware
• Direct-fit replacement for the left exhaust manifold
• Matches original fit and function on specified vehicles

Detailed Description

This exhaust manifold is engineered for 1998 Ford Explorer, left, from 2/98; 1999-2001 Ford Explorer, left; 1998 Mercury Mountaineer, left, from 2/98; and 1999-2001 Mercury Mountaineer, left. The Dorman 674-334 is built from cast iron and supplied in a regular-grade design with an oval port shape to support a proper exhaust seal and factory-style installation. This part cross-references ATP 101159 and OE number XL2Z9431CA for the same application.

Common Repair Uses

• Cracked or warped exhaust manifold replacement
• Exhaust leaks at the manifold-to-cylinder-head sealing surface
• Broken or missing manifold mounting hardware
• Noise from a leaking left-side exhaust manifold
• Failed gasket sealing on Explorer or Mountaineer exhaust systems

Installation Notes and Tips

Verify left-side fitment by year, model, and build date before installation. Inspect the cylinder-head sealing surface, exhaust fasteners, and downpipe connection for damage or corrosion before assembly. Use the included gasket and hardware during installation, and confirm proper alignment of the manifold and exhaust connection before final tightening.

Quality Assurance

Dorman manufactures this manifold to match original fit and function for the listed vehicles. The cast iron construction and included installation components support a complete repair on the specified Ford Explorer and Mercury Mountaineer applications.