Dorman 674-161 Exhaust Manifold - Right

Exhaust Manifold for GM Right-Side Applications

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 right-side exhaust service on Chevrolet and GMC trucks and vans from the mid-1980s through the 1990s. Part number 674-161 includes the gaskets, flange, and downpipe hardware needed for a complete repair.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with square port shape
• Heat shield included
• Gasket or seal included for installation
• Mounting hardware included
• Direct replacement for the original manifold on listed applications
• Part number 674-161

Detailed Description

Dorman 674-161 is an exhaust manifold for the right side of select Chevrolet and GMC applications, including Chevrolet C20, C30, K30, R20, R30, V20 Suburban, V30, G30, P30, and GMC C2500, C3500, K3500, R2500, R3500, V3500, G3500, and P3500 models. It is engineered to restore the original manifold’s fit and function while using a cast iron design suited for exhaust heat and long-term service. The included manifold gasket, flange, studs, nuts, springs, and washers support a complete exhaust manifold repair on the specified vehicles. This part cross-references 101071 and 651151 for the same application.

What It Helps Repair

• Exhaust leaks at the manifold-to-cylinder head sealing surface
• Cracked or warped original manifold housings
• Broken or missing manifold mounting points
• Noise from a leaking right-side exhaust manifold
• Failed flange or downpipe connection hardware

Installation Notes and Tips

Verify engine-side and chassis-side clearance before installation, especially on Chevrolet and GMC C/K, R/V, G, and P-series platforms. Confirm the right-side position and compare the port shape and mounting points to the original manifold before assembly. Clean the sealing surfaces thoroughly and replace any damaged fasteners or mating components during repair.

Quality Assurance

This Dorman manifold is manufactured to match original fit and function on the listed vehicles and is supplied with the sealing and hardware components specified for the repair.