Dorman 674-785 Exhaust Manifold - Right

OE-Style Exhaust Manifold Replacement

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 the right side exhaust repair on applications such as the Chevrolet Colorado, GMC Canyon, and Hummer H3. Part number 674-785 includes the gaskets, flange, heat shield, and downpipe hardware needed for a complete repair.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with round port shape
• Includes gasket/seal, heat shield, and mounting hardware
• Package contents support a complete manifold replacement
• Direct-fit replacement for the right-side exhaust manifold on listed vehicles
• Dorman 674-785 is built to match original fit and function

Detailed Product Description

Dorman 674-785 is an exhaust manifold replacement for the right side of select 2003-2012 GM and related vehicles. It is engineered to align with the original manifold’s fitment and exhaust routing, helping restore proper sealing and exhaust flow. This part cross-references 101408 and 12567484 for the same application. For buyers searching for a right exhaust manifold for a 2009-2012 Chevrolet Colorado, 2009-2012 GMC Canyon, or 2008-2010 Hummer H3, this manifold provides an OE-style repair solution with the necessary sealing and flange components included.

What This Part Helps Address

• Exhaust leaks at the manifold-to-cylinder head sealing surface
• Cracked or warped original manifold castings
• Broken flange connections at the downpipe interface
• Noise from escaping exhaust gases on the right side
• Failed heat shielding or damaged manifold hardware

Installation Notes and Tips

Verify right-side fitment before installation and compare the port shape, mounting points, and exhaust connection layout to the original part. Clean the mating surfaces thoroughly before assembly to help achieve a proper seal. Because this manifold includes gaskets and downpipe hardware, it supports a more complete repair on vehicles such as the Chevrolet Trailblazer, GMC Envoy, and Saab 9-7x. Always confirm vehicle year, make, model, and position against the application list before ordering Dorman 674-785.

Quality Assurance

This manifold is manufactured to match original fit and function on specified applications and is built from cast iron for regular-duty exhaust service. Dorman 674-785 is intended as a direct replacement part for the listed vehicles, including Chevrolet Colorado, GMC Canyon, and Hummer H3 right-side applications.