Dorman 674-918 Exhaust Manifold - Rear

Reliable Cast Iron Exhaust Manifold for Select GM Vehicles

The Dorman 674-918 exhaust manifold is engineered to provide durable exhaust flow management for a range of Buick, Chevrolet, Oldsmobile, Pontiac, and Saturn models. Designed with cast iron construction and a natural finish, this exhaust manifold offers consistent performance and longevity.

• Constructed from durable cast iron material for heat resistance and strength
• Natural color finish complements OEM appearance
• Irregular port shape designed to match specific engine configurations
• Includes exhaust manifold gasket, flange, 6 studs, and 6 nuts for a complete installation
• Equipped with a heat shield to protect surrounding components from excessive heat

Detailed Product Description

The Dorman 674-918 exhaust manifold is a direct replacement part designed to restore proper exhaust flow and engine efficiency in compatible vehicles. Its cast iron construction ensures reliable heat tolerance and structural integrity under high-temperature conditions. The irregular port shape is tailored to fit the exhaust ports of various GM engines, ensuring a precise seal and optimal exhaust gas evacuation. This manifold comes with a heat shield to reduce heat transfer to nearby engine components, helping maintain overall engine bay temperature control. The included gasket and mounting hardware simplify the installation process, providing a comprehensive solution for exhaust manifold replacement.

Compatible Vehicles and Common Applications

• Buick Alero, Century, Rendezvous, Terraza
• Chevrolet Impala, Monte Carlo, Uplander, Montana
• Oldsmobile Silhouette
• Pontiac Aztek, Grand Am, Relay, Montana
• Saturn Relay

This exhaust manifold is suitable for addressing issues such as exhaust leaks, decreased engine performance, unusual exhaust noises, and failed emissions tests related to manifold damage or gasket failure.

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Clean the mounting surface thoroughly to ensure a proper seal with the new gasket
• Torque mounting hardware to manufacturer specifications to prevent leaks
• Inspect the heat shield placement to avoid contact with wiring or hoses

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 674-918 exhaust manifold undergoes rigorous quality checks to ensure durability and performance. This part includes a limited warranty covering defects in material and workmanship, providing confidence in your replacement component.