Dorman 674-479 Exhaust Manifold

Dorman Exhaust Manifold 674-479

This Dorman exhaust manifold is precision-engineered and durably manufactured to match the fit and function of the original manifold on specified vehicles. Built from cast iron with a metallic gray finish, it is a direct-fit exhaust manifold replacement for select Chevrolet, GMC, Buick, Cadillac, and Chevrolet S10 applications.

Compatible With 2015-2022 Chevrolet Colorado, 2015-2022 GMC Canyon, 2017-2020 Buick Envision, 2014-2019 Chevrolet Impala, 2013-2017 Cadillac ATS, 2016-2017 Chevrolet S10, 2016 Chevrolet Malibu Limited, and 2013-2015 Chevrolet Malibu.

• Cast iron construction for exhaust durability
• Round port shape with a 2-inch collector port diameter
• Oxygen sensor port included
• Standard replacement grade for OE-style fit and function
• Mounting hardware and gasket/seal included for a complete repair
• 8 mounting holes for proper installation alignment
• Heat shield not included

Part number 674-479 is built to restore the exhaust path on vehicles that need a replacement manifold with the correct port layout and sensor provision. It is a practical choice for drivers searching for a 2015-2022 Chevrolet Colorado exhaust manifold, a 2015-2022 GMC Canyon exhaust manifold, or a 2013-2015 Chevrolet Malibu exhaust manifold replacement. This part cross-references Monroe Shocks & Struts (e.g., 662974, 12627186) for the same application.

Common Repair Uses

• Cracked or warped exhaust manifold replacement
• Exhaust leaks at the manifold-to-cylinder head sealing surface
• Broken or leaking manifold gasket service
• Oxygen sensor port repair needs during exhaust service
• Downpipe connection issues requiring new manifold hardware

Installation Notes

Verify engine and emissions configuration before installation, since fitment is listed by vehicle application. Use the included gasket and hardware during assembly, and inspect the cylinder head surface, fasteners, and downpipe connection points for damage or corrosion before tightening to specification.

Quality Assurance

Dorman manufactures this exhaust manifold as a standard replacement part engineered to match original fit and function on the listed vehicles. The cast iron construction and application-specific design support a direct repair for select Chevrolet Colorado, GMC Canyon, and related models.