Dorman 674-278 Exhaust Manifold - Left

Durable Cast Iron Exhaust Manifold for Chevrolet and GMC Trucks

The Dorman 674-278 exhaust manifold is engineered to provide reliable exhaust flow for a range of Chevrolet and GMC truck models. Constructed from cast iron with a natural finish, this exhaust manifold is designed to withstand high temperatures and deliver consistent performance.

• Material: Heavy-duty cast iron for durability and heat resistance
• Color: Natural cast iron finish
• Port Shape: Square ports for optimal exhaust flow
• Mounting Hardware Included: Yes, for straightforward installation
• Gasket Included: Comes with a manifold gasket to ensure a proper seal
• Grade Type: Regular grade for standard replacement needs
• Package Contents: Exhaust manifold, 1 manifold gasket, 1 flange, 3 studs, and 3 nuts

Product Details and Specifications

The Dorman 674-278 exhaust manifold is designed specifically for compatibility with Chevrolet and GMC trucks including C10, C10 Suburban, C20, C20 Suburban, C30, C1500, C1500 Suburban, C2500, C2500 Suburban, C3500, Jimmy, K5 Blazer, K10, K10 Suburban, K20, K20 Suburban, K30, K1500, K1500 Suburban, K2500, K2500 Suburban, and K3500 models. Its cast iron construction offers excellent resistance to cracking and warping under extreme heat conditions common in exhaust systems. The square port design helps maintain efficient exhaust gas flow, contributing to engine performance and emissions control.

Common Applications and Problem Solving

• Replacement for cracked or warped exhaust manifolds causing exhaust leaks
• Restores proper exhaust flow to improve engine efficiency
• Eliminates exhaust manifold gasket leaks that cause noise and fumes
• Addresses corrosion damage from prolonged exposure to heat and elements
• Suitable for restoring original exhaust system performance on Chevrolet and GMC trucks

Installation Notes and Tips

Installation of the Dorman 674-278 exhaust manifold is simplified by the inclusion of mounting hardware and a gasket. Ensure all old gasket material is fully removed before installation to prevent leaks. Torque mounting bolts to manufacturer specifications to avoid warping. It is recommended to inspect related exhaust components during installation for wear or damage.

Quality Assurance and Warranty

Dorman exhaust manifolds are manufactured to meet or exceed OEM standards for fit, form, and function. The 674-278 part number undergoes rigorous quality control to ensure durability and performance. Please refer to Dorman's warranty policy for specific coverage details.