Dorman 674-446 Exhaust Manifold - Right

Durable Cast Iron Exhaust Manifold for Chevrolet and GMC Vans

The Dorman 674-446 exhaust manifold is engineered to provide reliable exhaust flow for Chevrolet Express and GMC Savana 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 for long-lasting strength
• Natural color finish with square port shape for optimal exhaust flow
• Includes mounting hardware and gaskets for straightforward installation
• Compatible with Chevrolet Express 1500, 2500, 3500 and GMC Savana 1500, 2500, 3500 models
• Part number 674-446 ensures exact fit and function

Product Details and Specifications

This exhaust manifold features a square port shape that matches the cylinder head ports for efficient exhaust gas evacuation. The package includes the exhaust manifold itself, one manifold gasket, one flange gasket, and three studs, providing all necessary components for installation. While it does not include a heat shield, the cast iron construction offers excellent heat resistance and durability under regular operating conditions. The grade type is regular, suitable for standard replacement needs.

Compatible Vehicles and Applications

The Dorman 674-446 exhaust manifold is specifically designed for use with Chevrolet Express 1500, 2500, and 3500 series vans, as well as GMC Savana 1500, 2500, and 3500 models. It also fits P30 and P3500 chassis configurations, making it a reliable choice for these full-size vans requiring exhaust manifold replacement.

• Replaces cracked or leaking exhaust manifolds
• Addresses exhaust leaks causing engine noise or reduced efficiency
• Restores proper exhaust flow to improve engine performance
• Helps resolve check engine light issues related to exhaust leaks
• Prevents exhaust fumes from entering the cabin

Installation Notes and Tips

Installation of the Dorman 674-446 exhaust manifold is simplified by the inclusion of mounting hardware and gaskets. It is recommended to clean the cylinder head surface thoroughly before installation to ensure a proper seal. Torque the manifold bolts to manufacturer specifications to avoid leaks or damage. Since this manifold does not include a heat shield, verify if your vehicle requires one and reuse the original if necessary.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing dependable fit and function. The 674-446 exhaust manifold undergoes quality inspections to ensure durability and performance. Please refer to Dorman's warranty policy for specific coverage details.