Dorman 674-497 Exhaust Manifold - Left

OE Fix Exhaust Manifold for Ram and Wagoneer

Dorman 674-497 is a left-side exhaust manifold engineered for select Ram 1500 trucks and Jeep Wagoneer SUVs with cylinder deactivation. It addresses the heat cycling that can warp or crack the original manifold by using a reinforced design and ceramic coating for more even heat distribution.

Key Features

• Direct replacement left exhaust manifold for specified Ram 1500 and Jeep Wagoneer applications
• Integrated upper flange adds side strength to the manifold body
• Thicker lower flange helps resist distortion from repeated heat changes
• Ceramic-coated finish promotes more uniform heat distribution
• Made from ductile iron with a black finish
• Round port design with a 60 mm collector port diameter
• Standard replacement grade for OE-style service
• Mounting hardware and gasket/seal are listed in the product attributes

Detailed Description

This Dorman OE Fix exhaust manifold, part number 674-497, is built to replace the original left-side manifold on 2019-2024 Ram 1500, 2026 Ram 1500, and 2022-2023 Jeep Wagoneer models listed in the fitment data. It is designed around the known stress points created by cylinder deactivation, where alternating hot and cool exhaust ports can lead to cracking over time. The ductile iron construction, reinforced flange design, and ceramic coating work together to improve durability in this high-heat location. This part cross-references Mopar 68591573AA and 68591573AB for the same application.

Common Problems This Part Addresses

• Cracked left exhaust manifold
• Warped manifold flange from uneven heat exposure
• Exhaust leaks at the manifold-to-cylinder-head sealing surface
• Ticking or puffing exhaust noise from manifold failure
• Heat-related deterioration on Ram 1500 and Jeep Wagoneer exhaust systems

Installation Notes and Tips

Fits 2019-2024 Ram 1500, left; fits 2026 Ram 1500, left; fits 2022-2023 Jeep Wagoneer, left. Review TSB 09-001-24 before installation. Confirm the cylinder head sealing surface is clean and flat, and inspect related fasteners and exhaust connections for heat damage before reassembly. Verify the vehicle’s left-side application and engine configuration against the service information prior to installation.

Quality Assurance

Dorman designs this manifold as an OE-style replacement with upgraded reinforcement and heat-management features for the listed applications. Part number 674-497 is engineered to replace the original left-side manifold on the specified Ram and Jeep vehicles.