Dorman 674-5013 Exhaust Manifold - Left

Durable Cast Iron Exhaust Manifold for Chevrolet and GMC

The Dorman 674-5013 exhaust manifold is engineered to provide reliable exhaust flow for Chevrolet Express 3500 and GMC Savana 3500 models. Constructed from cast iron with a natural finish, this manifold offers durability and heat resistance for demanding engine conditions.

• Material: Heavy-duty cast iron construction
• Color: Natural cast iron finish
• Port Shape: Irregular design for optimized exhaust flow
• Tube Wall Thickness: 5 mm for enhanced strength
• Includes mounting hardware, inlet and outlet gaskets, and heat shield
• Oxygen sensor port: Not included

Product Details and Specifications

This exhaust manifold is designed specifically for the Chevrolet Express 3500 and GMC Savana 3500, ensuring proper fit and function. The cast iron material withstands high temperatures and resists cracking, while the irregular port shape supports efficient exhaust gas evacuation. The 5 mm tube wall thickness adds structural integrity, reducing the risk of warping over time. Included with the manifold are essential mounting hardware, inlet and outlet gaskets, and a heat shield to protect surrounding components from excessive heat.

Common Applications and Problem Solving

• Replacement for cracked or warped exhaust manifolds
• Eliminates exhaust leaks causing engine noise or reduced performance
• Restores proper exhaust flow to improve engine efficiency
• Prevents heat damage to nearby engine components with included heat shield
• Ensures secure mounting with included hardware and gaskets

Installation Notes and Tips

When installing the Dorman 674-5013 exhaust manifold on Chevrolet Express 3500 or GMC Savana 3500 vehicles, ensure all old gasket material is fully removed before fitting the new gaskets. Use the included mounting hardware to secure the manifold evenly, avoiding overtightening to prevent damage. The heat shield should be positioned correctly to protect adjacent parts from heat exposure. Professional installation is recommended for optimal results.

Quality Assurance and Warranty

Dorman exhaust manifolds are manufactured to meet or exceed OEM standards for fit, form, and function. The 674-5013 part is backed by Dorman's quality assurance processes to ensure durability and performance. Please refer to Dorman's official warranty policy for specific coverage details.