Dorman 674-418 Exhaust Manifold

Exhaust Manifold for Select GM Vehicles

This Dorman exhaust manifold is engineered to match the original fit and function on specified vehicles, making it a direct repair option for exhaust leaks, cracked manifolds, and failed sealing surfaces. Dorman 674-418 is built from cast iron and includes the gaskets and downpipe hardware needed for a complete exhaust manifold replacement on select Chevrolet, Pontiac, and Saturn applications.

Key Features

• Cast iron construction for durable exhaust service
• Natural finish with a rectangle port shape
• Includes gasket and seal components for the repair
• Mounting hardware included for installation
• Direct-fit replacement for specified GM applications
• Part number 674-418 for easy identification

Detailed Product Overview

Designed as an OE-style replacement, this exhaust manifold is built to restore the factory exhaust path and sealing interface on vehicles such as the Chevrolet HHR, Chevrolet Cobalt, Pontiac G5, Saturn Vue, and Chevrolet Captiva Sport. The manifold is precision-engineered to align with the original mounting points and exhaust connection geometry, helping support a proper repair on 2008-2011 applications. Dorman 674-418 also cross-references OE part number 12603792 for the same application.

The package contents include the exhaust manifold, manifold gasket, flange gasket, studs, and nuts. This makes it a practical choice when replacing a damaged manifold or addressing exhaust noise and leakage at the manifold-to-cylinder-head or manifold-to-downpipe connection.

Vehicle Fitment

• Fits 2009-2011 Chevrolet HHR, N/A
• Fits 2009-2010 Chevrolet Captiva Sport, N/A
• Fits 2009-2010 Chevrolet Cobalt, N/A
• Fits 2009-2010 Pontiac G5, N/A
• Fits 2009-2010 Saturn Vue, N/A
• Fits 2008 Chevrolet Captiva Sport, N/A, wo/EGR Port
• Fits 2008 Chevrolet Cobalt, N/A, wo/EGR Port
• Fits 2008 Chevrolet HHR, N/A, wo/EGR Port
• Fits 2008 Pontiac G5, N/A, wo/EGR Port
• Fits 2008 Saturn Vue, N/A, wo/EGR Port

Common Repair Uses

• Exhaust leaks at the manifold or flange
• Cracked or warped original manifold
• Broken studs or damaged mounting points
• Failed gasket sealing at the exhaust connection
• Noise from the exhaust manifold area

Installation Notes

Confirm engine configuration and EGR-port requirements before installation, especially on 2008 vehicles listed without an EGR port. Inspect the cylinder-head sealing surface, replace damaged fasteners as needed, and torque all hardware to the vehicle manufacturer’s specifications. Verify exhaust alignment at the flange before final tightening to help prevent leaks.

Quality Assurance

Dorman manufactures this manifold to match the fit and function of the original part on the listed vehicles. The cast iron construction, included sealing components, and supplied mounting hardware support a complete exhaust manifold repair on compatible Chevrolet, Pontiac, and Saturn models.