Dorman 674-537 Exhaust Manifold - Left

Dorman 674-537 Exhaust Manifold

Dorman 674-537 is a cast iron exhaust manifold engineered to match the original fit and function on specified vehicles. It includes the gaskets and downpipe hardware needed for a complete repair, making it a direct replacement for worn or cracked OE-style manifolds.

• Cast iron construction for durable exhaust service
• Natural finish with square port shape
• Includes gasket and flange for sealing the exhaust connection
• Includes mounting hardware for installation
• Direct replacement for the left-side manifold on select Chevrolet and GMC vans

Fitment Details

Compatible with 1987-1994 Chevrolet G10, left; 1987-1994 Chevrolet G20, left; 1989-1994 GMC G1500, left; 1987-1994 GMC G2500, left; 1987-1988 Chevrolet G30, left; and 1987-1988 GMC G3500, left. This Dorman exhaust manifold 674-537 is a fitment-specific replacement for the left side on these Chevrolet and GMC applications.

This part cross-references 101306 and 10166145 for the same application.

Common Repair Uses

• Replacing a cracked or warped exhaust manifold
• Restoring exhaust sealing at the cylinder head and downpipe connection
• Addressing exhaust leaks that can cause ticking noises or odor in the cabin
• Repairing broken manifold studs or damaged flange hardware
• Correcting fitment issues on the left side of select Chevrolet G10, G20, G30 and GMC G1500, G2500, G3500 vans

Installation Notes

Verify left-side fitment before installation and compare the port shape, mounting points, and gasket surfaces to the original part. Clean the mating surfaces thoroughly, inspect the exhaust flange and studs, and replace any damaged fasteners or sealing surfaces during service. Proper torque sequence is important to help maintain a secure seal.

Quality Assurance

This manifold is precision-engineered and manufactured to match original fit and function on specified vehicles. Dorman 674-537 is built as a regular-grade replacement part for service on select Chevrolet and GMC applications.