Dorman 674-390 Exhaust Manifold - Right

Durable Cast Iron Exhaust Manifold for Chevrolet and GMC

The Dorman 674-390 exhaust manifold is engineered to provide reliable exhaust flow for select Chevrolet and GMC trucks and vans. Constructed from cast iron with a natural finish, this exhaust manifold is designed to withstand high temperatures and deliver consistent performance for your vehicle.

• Made from durable cast iron material
• Natural color finish for corrosion resistance
• Square port shape for precise exhaust flow
• Includes mounting hardware: 3 studs and 3 nuts
• Comes with one manifold gasket for proper sealing
• Compatible with Chevrolet and GMC heavy-duty trucks and vans

Product Details and Specifications

The Dorman 674-390 exhaust manifold features a regular grade type construction, ensuring dependable strength and longevity. Its square port design matches the exhaust ports on compatible engines, promoting efficient exhaust gas evacuation. This manifold includes all necessary mounting hardware and a gasket to simplify installation. Note that a heat shield is not included with this part. The natural cast iron finish offers resistance to rust and heat-related wear, making it suitable for demanding applications.

Compatible Vehicles and Applications

This exhaust manifold is compatible with a range of Chevrolet and GMC models, including C2500, C2500 Suburban, C3500, Express 3500, K2500, K2500 Suburban, K3500, P30, P3500, and Savana 3500. It is designed specifically for these heavy-duty trucks and vans, ensuring proper fit and function when replacing a worn or damaged exhaust manifold.

• Replaces cracked or leaking exhaust manifolds
• Addresses exhaust leaks causing noise or fumes
• Restores proper exhaust flow and engine efficiency
• Helps resolve engine performance issues related to exhaust backpressure
• Prevents exhaust gases from entering the engine compartment

Installation Notes and Tips

Installation of the Dorman 674-390 exhaust manifold requires basic mechanical skills and tools. Ensure the engine is cool before beginning work. Use the included gasket and mounting hardware to secure the manifold tightly to the engine block. Inspect the exhaust ports and surrounding components for damage or corrosion before installation. Torque the nuts and studs to manufacturer specifications to prevent leaks and ensure a secure fit.

Quality Assurance and Warranty

Dorman exhaust manifolds are manufactured to meet or exceed OEM standards for fit, form, and function. The 674-390 part number undergoes rigorous quality control to ensure durability and performance. This product includes a limited warranty against defects in material and workmanship, providing confidence in your replacement part.