Dorman 674-157 Exhaust Manifold - Left

Durable Cast Iron Exhaust Manifold for Chevrolet and GMC Vehicles

The Dorman 674-157 exhaust manifold is engineered to provide reliable exhaust flow for a range of Chevrolet and GMC trucks and SUVs. Designed with durable cast iron and including all necessary mounting hardware, this exhaust manifold ensures a secure fit and long-lasting performance.

• Constructed from heavy-duty cast iron for strength and heat resistance
• Natural color finish with square port shape for optimal exhaust flow
• Includes exhaust manifold, manifold gasket, flange gasket, studs, and mounting hardware
• Equipped with a heat shield to protect surrounding components
• Compatible with Chevrolet and GMC models including Blazer, C1500, K1500, Tahoe, Yukon, and more

Product Details and Specifications

The Dorman 674-157 exhaust manifold is designed to replace worn or damaged manifolds on select Chevrolet and GMC vehicles. Its cast iron construction withstands high temperatures and resists cracking, while the square port shape matches OEM specifications for proper exhaust gas flow. The included heat shield helps reduce heat transfer to nearby engine parts, enhancing durability. This manifold comes with all necessary gaskets and mounting hardware, simplifying installation and ensuring a proper seal.

Compatible Chevrolet and GMC Models

This exhaust manifold is compatible with a variety of Chevrolet and GMC trucks and SUVs, including the Chevrolet Blazer, C1500, C1500 Suburban, C2500, C2500 Suburban, C3500, Tahoe, Yukon, and GMC G10, G20, K1500, K1500 Suburban, K2500, K2500 Suburban, and K3500 models. The part number 674-157 corresponds specifically to these applications, ensuring a precise fit.

Common Issues Addressed by This Exhaust Manifold

• Exhaust leaks caused by cracked or warped manifolds
• Reduced engine performance due to improper exhaust flow
• Excessive engine noise from damaged exhaust components
• Failed emissions tests related to exhaust system leaks
• Overheating of engine bay components without proper heat shielding

Installation Notes and Tips

Installation of the Dorman 674-157 exhaust manifold requires basic mechanical skills and tools. Ensure the engine is cool before beginning work. Use the included gaskets and mounting hardware to achieve a proper seal and secure fit. Torque all bolts to manufacturer specifications to prevent leaks. Inspect the exhaust ports and clean any debris before installation to ensure optimal sealing.

Quality Assurance and Warranty

Dorman exhaust manifolds are manufactured to meet or exceed OEM standards for fit and function. The 674-157 part includes a heat shield and all necessary hardware to facilitate a reliable installation. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship to provide confidence in product quality.