Dorman 674-100 Exhaust Manifold

Durable Stainless Steel Exhaust Manifold for Chevrolet and GMC

The Dorman 674-100 exhaust manifold is designed to provide reliable exhaust flow for Chevrolet and GMC trucks and SUVs. Engineered with quality stainless steel and including all necessary mounting hardware, this manifold is a practical replacement for worn or damaged exhaust components on your S10, S10 Blazer, S15, S15 Jimmy, or Sonoma.

• Constructed from corrosion-resistant stainless steel for long-lasting durability
• Natural finish with square port shape for optimal exhaust flow
• Includes mounting hardware, two manifold gaskets, one flange gasket, and two bolts for complete installation
• Equipped with a heat shield to protect surrounding components from excessive heat
• Compatible with Chevrolet and GMC S10, S10 Blazer, S15, S15 Jimmy, and Sonoma models

Product Features and Specifications

The Dorman 674-100 exhaust manifold features a regular grade stainless steel construction that resists rust and corrosion, ensuring consistent performance over time. Its natural color finish maintains the original appearance without additional coatings. The square port shape is designed to match factory exhaust ports, promoting efficient exhaust gas evacuation. This manifold comes complete with a heat shield to reduce heat transfer to nearby engine parts, helping to maintain engine bay temperatures. Included mounting hardware and gaskets simplify the installation process, providing a comprehensive replacement solution.

Compatible Vehicles and Applications

This exhaust manifold is compatible with a range of Chevrolet and GMC models, specifically the S10, S10 Blazer, S15, S15 Jimmy, and Sonoma. It is intended for use in exhaust system repairs or upgrades where the original manifold is cracked, warped, or otherwise compromised.

• Replacement for cracked or leaking exhaust manifolds
• Restores proper exhaust flow and engine efficiency
• Eliminates exhaust leaks that cause noise and emissions issues
• Prevents heat damage to engine components with included heat shield
• Supports emission compliance by maintaining exhaust integrity

Installation Notes and Tips

Installation of the Dorman 674-100 exhaust manifold requires basic mechanical skills and tools. Ensure the engine is cool before beginning work. Remove the old manifold and clean the mounting surface thoroughly to prevent gasket leaks. Use the included gaskets and hardware to secure the new manifold, tightening bolts to manufacturer torque specifications. Inspect the heat shield placement to ensure proper protection. It is recommended to check for exhaust leaks after installation and retighten bolts if necessary.

Quality Assurance and Warranty

Dorman manufactures this exhaust manifold to meet or exceed OEM standards for fit and function. The stainless steel material offers resistance to corrosion and heat-related wear. This part includes a limited warranty against defects in materials and workmanship, providing confidence in its durability and performance for Chevrolet and GMC S10, S10 Blazer, S15, S15 Jimmy, and Sonoma vehicles.