Dorman 674-496 Exhaust Manifold - Right

OE-Style Right Exhaust Manifold for GM V8 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 repairs on select Cadillac, Chevrolet, and GMC trucks and SUVs, including Silverado 1500, Tahoe, Yukon, and Escalade applications.

Part number 674-496 includes the manifold gasket, flange gasket, studs, nuts, and downpipe hardware needed for a complete repair. It is a direct replacement for the original manifold on the listed vehicles and cross-references OE number 12629338 for the same application.

Key Features

• Cast iron construction for exhaust manifold durability
• Natural finish with oval port shape
• Right-side manifold for listed GM applications
• Includes manifold gasket and flange gasket
• Includes mounting hardware for installation
• No oxygen sensor port
• Regular-grade replacement part

Detailed Product Overview

Dorman 674-496 is an exhaust manifold replacement for 2014-2020 GM trucks and SUVs that use the right-side manifold configuration. It is engineered to match original fit and function, helping restore proper exhaust routing on vehicles such as the 2014-2018 Chevrolet Silverado 1500, 2015-2020 Chevrolet Tahoe, 2015-2020 GMC Yukon, and 2015-2020 Cadillac Escalade. The cast iron body and 0.43 tube wall thickness support long-term service in high-heat exhaust environments.

This part number 674-496 is also listed for 2014-2019 Chevrolet Cheyenne, 2019 Chevrolet Silverado 1500 LD, and 2019 GMC Sierra 1500 Limited. The oval port design and no oxygen sensor port configuration make it a direct-fit solution for the specified engine and chassis combinations.

What This Part Helps Address

• Cracked or warped exhaust manifold on the right side
• Exhaust leaks at the manifold or flange connection
• Broken or missing manifold studs and nuts
• Damaged gasket sealing surfaces
• Noise from a leaking manifold on GM V8 trucks and SUVs

Installation Notes and Tips

Verify engine and position before installation, since this manifold is for the right side only. Confirm the vehicle is one of the listed applications, including 2014-2018 Chevrolet Silverado 2500, 2014-2018 GMC Sierra, and 2014-2015 Chevrolet Cheyenne with the specified 6.2L V8 application where noted. Inspect the cylinder head and downpipe flange surfaces for damage before assembly, and replace any worn fasteners or sealing surfaces as needed.

Because this manifold does not include an oxygen sensor port, confirm the original equipment layout matches the replacement part before ordering. Part number 674-496 is supplied with the gaskets and hardware needed for the repair, which helps streamline installation on the correct vehicle.

Quality Assurance

Dorman manufactures this exhaust manifold to match original fit and function on the listed vehicles. The design uses durable cast iron construction and application-specific hardware and gaskets to support a proper repair on compatible Cadillac, Chevrolet, and GMC models.