Dorman 674-398 Exhaust Manifold - Right

Overview of the Dorman 674-398 Exhaust Manifold

The Dorman 674-398 exhaust manifold is designed for reliable performance in Ford and Lincoln vehicles, including popular models like the F-150 and E-350 Econoline. Crafted from durable cast iron, this exhaust manifold ensures a natural finish and comes complete with essential mounting hardware for straightforward installation.

• Constructed from cast iron for durability and heat resistance
• Natural color finish matching OEM appearance
• Round port shape for optimal exhaust flow
• Includes exhaust manifold gasket, 2 bolts, and 2 nuts for installation
• Compatible with Ford and Lincoln models such as F-150, E-150 Econoline, and Navigator
• Grade type: Regular, suitable for standard replacement needs

Detailed Product Description

This Dorman exhaust manifold (part number 674-398) is engineered to meet the specifications of various Ford and Lincoln vehicles, including the E-150 Econoline Club Wagon, F-250 Super Duty, and Lincoln Navigator. Made from cast iron, the manifold offers strength and resistance to high temperatures generated by engine exhaust gases. The round port shape is designed to maintain efficient exhaust flow, reducing backpressure and supporting engine performance. The natural color finish aligns with original equipment standards, providing a clean and functional appearance under the hood.

The package includes the exhaust manifold itself, one manifold gasket, two bolts, and two nuts, ensuring you have the necessary hardware for installation. While this part does not include a heat shield, it is designed to fit securely and function reliably within the exhaust system of compatible vehicles.

Common Applications and Problem Resolution

• Replacement for cracked or warped exhaust manifolds causing exhaust leaks
• Restores proper exhaust flow to improve engine efficiency
• Eliminates exhaust manifold gasket leaks that can cause noise and emissions issues
• Addresses manifold mounting hardware failures or corrosion
• Suitable for restoring exhaust system integrity on Ford F-350 Super Duty and Lincoln Navigator models

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Use the included gasket and mounting hardware for a secure, leak-free fit
• Torque bolts to manufacturer specifications to prevent warping or leaks
• Inspect surrounding exhaust components for wear or damage during installation
• Check for proper alignment of the round ports to the cylinder head exhaust outlets

Quality Assurance and Warranty Information

Dorman manufactures this exhaust manifold to meet or exceed OEM standards for fit, form, and function. The cast iron construction provides durability under normal operating conditions. This part is backed by Dorman's limited warranty, which covers defects in material and workmanship. For specific warranty details, refer to Dorman's official documentation.