Dorman 674-498 Exhaust Manifold - Right

Dorman OE Fix Exhaust Manifold

The Dorman 674-498 is a right-side exhaust manifold for select Ram 1500 and Jeep Wagoneer applications. It addresses a known failure point on engines with cylinder deactivation by using a reinforced design and ceramic coating to help manage heat more evenly across the manifold.

Built from ductile iron with a black ceramic-coated finish, this exhaust manifold is engineered as a direct replacement for the original right-side unit on specified vehicles. The upgraded flange design adds strength where the OE part is prone to warping and cracking, making it a practical choice for Ram 1500 exhaust manifold replacement and Jeep Wagoneer exhaust manifold repair.

• Ductile iron construction for durability
• Ceramic-coated finish for more uniform heat distribution
• Integrated upper flange to reinforce the manifold sides
• Thicker lower flange for added strength
• Round port shape with a 60 mm collector port diameter
• Standard replacement grade for OE-style service
• Right-side application for select Ram 1500 and Jeep Wagoneer models

Detailed Product Overview

Dorman 674-498 is designed to replace the original equipment right exhaust manifold on 2019-2024 Ram 1500, 2026 Ram 1500, and 2022-2023 Jeep Wagoneer vehicles listed in the fitment data. The manifold uses ductile iron and a ceramic coating to help reduce the thermal stress that can occur when cylinder deactivation creates uneven heating across the casting. The reinforced flange structure is intended to improve rigidity in the areas commonly affected by warping or cracking.

This part cross-references Ram OE numbers 68591572AB and 68591572AC for the same application. For buyers searching for a 2019-2024 Ram 1500 right exhaust manifold or a 2022-2023 Jeep Wagoneer right exhaust manifold, part number 674-498 provides a direct-fit service solution for the listed vehicles.

Common Problems This Part Addresses

• Cracked exhaust manifold on the right side
• Warping caused by repeated heat cycling
• Exhaust leaks at the manifold flange
• Noise from a failing manifold casting
• Heat-related stress from cylinder deactivation operation

Installation Notes and Tips

Verify the vehicle’s year, make, model, and right-side application before installation. Follow the service information and the referenced TSB 09-001-24 when installing on the listed Ram 1500 and Jeep Wagoneer applications. Inspect the mating surfaces, fasteners, and exhaust sealing components during service to help ensure a proper seal and correct alignment.

Quality Assurance

Dorman designs OE Fix parts to address known failure points in original equipment components. Part number 674-498 uses an upgraded manifold design with reinforced flanges and ceramic coating to support long-term service on the specified Ram 1500 and Jeep Wagoneer applications.