Dorman 674-728 Exhaust Manifold - Right

Exhaust Manifold for GM 6.0L Applications

Dorman 674-728 is a cast iron exhaust manifold engineered to match the fit and function of the original manifold on specified vehicles. It is built for the right side and includes the gasket, heat shield, and downpipe hardware needed for a complete exhaust manifold repair.

Compatible with select Chevrolet Silverado 2500 HD, Silverado 3500, Suburban 2500, Avalanche 2500, GMC Sierra 2500 HD, Sierra 3500, and Yukon XL 2500 applications, this Dorman 674-728 replacement is designed for direct service on vehicles without A.I.R. equipment.

Key Features

• Cast iron construction for exhaust system durability
• Natural finish with square port shape
• Right-side exhaust manifold for specified GM trucks and SUVs
• Includes gasket or seal and heat shield
• Mounting hardware included for a complete repair setup
• Package contents include manifold, gasket, flange, studs, nuts, air studs, and air nuts

Detailed Description

This exhaust manifold is precision-engineered to replicate the original fit and function on the listed Chevrolet and GMC vehicles. The cast iron design supports long-term service in high-heat exhaust environments, while the included gasket, flange, heat shield, and mounting hardware help streamline replacement work. Part number 674-728 is a direct-fit solution for right-side installations on 2001-2007 GM truck and SUV applications listed below.

This part cross-references ATP 101376 for the same application. The Dorman 674-728 also cross-references OE number 12557286 for the same application.

What It Helps Fix

• Cracked or warped exhaust manifold housing
• Exhaust leaks at the manifold-to-cylinder-head sealing surface
• Broken or corroded manifold mounting points
• Noise from leaking exhaust gases near the engine
• Damaged downpipe connection hardware

Installation Notes and Fitment

• Fits 2007 Chevrolet Silverado 2500 HD Classic, right, wo/A.I.R.
• Fits 2007 Chevrolet Silverado 3500 Classic, right, wo/A.I.R.
• Fits 2007 GMC Sierra 2500 HD Classic, right, wo/A.I.R.
• Fits 2007 GMC Sierra 3500 Classic, right, wo/A.I.R.
• Fits 2002-2006 Chevrolet Avalanche 2500, right, wo/A.I.R.
• Fits 2001-2006 Chevrolet Silverado 2500 HD, right, wo/A.I.R.
• Fits 2001-2006 Chevrolet Silverado 3500, right, wo/A.I.R.
• Fits 2001-2006 Chevrolet Suburban 2500, right, wo/A.I.R.
• Fits 2001-2006 GMC Sierra 2500 HD, right, wo/A.I.R.
• Fits 2001-2006 GMC Sierra 3500, right, wo/A.I.R.
• Fits 2001-2006 GMC Yukon XL 2500, right, wo/A.I.R.

Verify engine-side and emissions configuration before installation. Use the included gasket and hardware during assembly, and inspect the mating surfaces, studs, and flange for wear or corrosion before final torque.

Quality Assurance

Dorman manufactures this manifold to match original equipment fit and function for the specified vehicles. Part number 674-728 is built as a regular-grade replacement for service use on compatible Chevrolet and GMC applications.