Dorman 674-393 Exhaust Manifold - Left

Dorman 674-393 Exhaust Manifold for Jeep Left Side

Dorman 674-393 is a cast iron exhaust manifold engineered to match the fit and function of the original part on specified vehicles. It is built for the left side and includes the gaskets and downpipe hardware needed for a complete exhaust manifold repair on select Jeep applications.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with irregular port shape
• Direct-fit replacement for the left side
• Includes gasket and seal components for the repair
• Mounting hardware included
• Compatible with 1987-1991 Jeep Grand Wagoneer, left
• Compatible with 1987-1988 Jeep J10, left
• Compatible with 1987-1988 Jeep J20, left

Detailed Description

This Dorman exhaust manifold is precision-engineered to replicate the original manifold’s fit and function on the listed Jeep vehicles. The cast iron design supports long-term exhaust service, while the included manifold gasket, flange gasket, nuts, and washers help complete the repair. Part number 674-393 is a practical OE-style replacement for drivers servicing a Jeep Grand Wagoneer, J10, or J20 on the left side.

This part cross-references ATP 101153 and J8129210 for the same application.

Common Repair Issues

• Cracked or warped exhaust manifold
• Exhaust leaks at the manifold or flange
• Broken or missing manifold mounting hardware
• Failed gasket sealing at the cylinder head or downpipe connection
• Noise or odor caused by a leaking left-side manifold

Installation Notes and Tips

Verify left-side placement and confirm vehicle year, make, and model before installation. Inspect the cylinder head and downpipe mating surfaces for damage or carbon buildup, and clean all sealing surfaces before assembly. Replace any damaged fasteners or related exhaust components as needed to ensure proper sealing and alignment.

Quality Assurance

Dorman manufactures this manifold to match the original fit and function on specified vehicles. Part number 674-393 is built for direct replacement use on compatible Jeep applications.