Dorman 674-154 Exhaust Manifold

Dorman Exhaust Manifold for Select GM Turbo Applications

Dorman 674-154 is an OE FIX exhaust manifold kit for select Buick and Chevrolet turbocharged vehicles. It is built from cast iron and is engineered to replace the failed manifold without requiring replacement of the attached turbocharger, helping reduce repair cost on affected applications.

• Cast iron construction for exhaust heat durability
• Natural finish with oval port shape
• No oxygen sensor port
• Includes gasket and seal components for the manifold connection points
• Mounting hardware included for installation
• Direct replacement solution for select turbocharged GM vehicles

Application Details

Compatible with 2013-2019 Buick Encore, 2012-2019 Chevrolet Sonic, 2013-2018 Chevrolet Trax, 2011-2016 Chevrolet Cruze, and 2016 Chevrolet Cruze Limited. This Dorman 674-154 exhaust manifold is a practical repair option when the original manifold fails and the turbocharger remains serviceable. It is cross-referenced to 25198550 and TBC583 for the same application.

Common Repair Issues

• Cracked or leaking exhaust manifold
• Exhaust noise from the manifold area
• Loss of exhaust sealing at the turbo/manifold connection
• Check engine light related to exhaust leakage
• Need to replace the manifold without replacing the turbocharger

Installation Notes

Verify engine and turbocharger configuration before installation. Inspect the mating surfaces, replace worn fasteners as needed, and follow factory torque specifications during assembly. The package includes the manifold, inlet gasket, outlet gasket, mounting studs, nuts, clamps, O-ring, and bushings. Dorman 674-154 is intended for direct-fit replacement on the listed Buick Encore and Chevrolet Cruze, Sonic, and Trax applications.

Quality Assurance

Dorman OE FIX parts are engineered to address common original-equipment failure points with a repair-focused design. This manifold is built to restore the failed exhaust manifold section while avoiding unnecessary turbocharger replacement on the covered vehicles.