Dorman 674-694XD Exhaust Manifold - Right

Durable Cast Iron Exhaust Manifold for Ford and Lincoln Vehicles

The Dorman 674-694XD exhaust manifold is engineered to provide reliable exhaust flow for select Ford and Lincoln models. Constructed from cast iron with a metallic gray finish, this exhaust manifold offers durability and corrosion resistance for long-term use.

• Made from high-quality cast iron (hierro fundido) for strength and heat resistance
• Metallic gray color with a round port shape for optimal exhaust flow
• Collector port diameter of 1.5 inches to match OEM specifications
• Tube wall thickness of 4.5 mm for enhanced durability
• Includes gasket and mounting hardware for a complete replacement
• Standard replacement grade designed to meet factory fit and function
• Eight mounting holes for secure installation

Product Details and Specifications

The Dorman 674-694XD exhaust manifold is designed specifically for Ford Expedition, F-150, F-250 Super Duty, F-350 Super Duty, Mark LT, and Lincoln Navigator models. Its cast iron construction ensures it withstands high temperatures and resists cracking or warping over time. The round port shape and 1.5-inch collector port diameter maintain proper exhaust gas flow, which is critical for engine performance and emissions control. This manifold does not include an oxygen sensor port, so it is intended for applications where the sensor is located elsewhere in the exhaust system.

Common Applications and Problem Solving

• Replacement for cracked or leaking exhaust manifolds causing exhaust leaks or noise
• Restores proper exhaust flow to improve engine efficiency and reduce emissions
• Addresses manifold warping or damage from prolonged heat exposure
• Eliminates exhaust fumes entering the cabin due to manifold gasket failure
• Suitable for restoring factory fit and function on compatible Ford and Lincoln trucks and SUVs

Installation Notes and Tips

Ensure the engine is cool before beginning installation. Remove the old manifold carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly to ensure a proper seal with the included gasket. Torque mounting bolts to manufacturer specifications to prevent leaks. Since this manifold does not have an oxygen sensor port, verify sensor placement in your vehicle’s exhaust system before installation.

Quality Assurance and Warranty

Dorman exhaust manifolds are manufactured to meet or exceed OEM standards for fit, form, and function. The 674-694XD part number is backed by Dorman’s standard replacement grade quality assurance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts to ensure customer confidence and product reliability.