Dorman Passenger-Side Exhaust Manifold Kit for Jeep/Ram — Right Side Ceramic-Coated, Includes Gaskets & Hardware

Dorman's Improved Design Passenger-Side Exhaust Manifold Kit 674-498 replaces the OEM right-side manifold with a strengthened, ceramic-coated assembly that reduces the risk of warping and cracking from cylinder deactivation heat cycles.

Many Jeep Wagoneer and Ram 1500 engines use cylinder deactivation to improve highway fuel economy, which alternately cools and heats certain exhaust ports. That fluctuating thermal stress can lead the factory right-side exhaust manifold to warp or crack over time. Dorman engineered this OE Fix part to match OE fit and restore reliable exhaust flow while addressing the specific failure mode caused by thermal cycling.

How does this manifold resist damage from cylinder deactivation?

The 674-498 manifold incorporates structural and surface upgrades to manage uneven temperatures that occur when cylinders deactivate. An integrated upper flange stiffens the sidewalls, a beefier lower flange reduces flex, and a ceramic coating promotes more even heat distribution across the casting. Together, these features reduce the chances of stress-related cracking or leakage.

• Integrated upper flange for increased sidewall strength
• Thicker lower flange to minimize flex where bolts and gaskets seat
• Ceramic coating for uniform thermal dispersion and reduced hotspots

Will this Dorman kit fit my Jeep Wagoneer or Ram 1500?

This right-side manifold is built to directly replace the original equipment unit on specified model years of Jeep Wagoneer and Ram 1500. Fitment depends on vehicle year and exact engine configuration, so verify compatibility before ordering. Use the product page garage tool or the Confirmed Fit indicator to confirm your specific trim and options match the part.

• Compatible Jeep Wagoneer: 2022–2023
• Compatible Ram 1500: 2019–2024 (select trims—check fit tool)
• Includes required gaskets and fasteners for straightforward installation

What comes in the kit and what do I need to install it?

The Dorman kit ships with the replacement manifold plus the gaskets and hardware required to install the right-side unit. That comprehensive packaging helps avoid part-mismatch delays during repair. Basic tools and standard workshop procedures for exhaust manifold replacement are all that’s needed; professional installation is recommended if you’re not comfortable with exhaust-system work.

• Precision-engineered manifold assembly with ceramic-coated surface
• Included gaskets and mounting hardware to restore a leak-free connection
• Direct-replacement design intended for bolt-on installation

How does Dorman support quality and reliability?

Dorman backs this product with long-standing automotive engineering and parts support from teams in the United States. The manifold’s improved geometry and finish address a known OEM failure mode rather than simply duplicating the original casting. Purchasing a Dorman OE Fix part gives you an engineered repair intended to restore proper exhaust performance and durability.

• Engineered solution targeting a documented OEM weakness
• Designed and supported by experienced product experts in the U.S.
• Sold as a complete kit to reduce installation uncertainty

Who is this for: This Dorman 674-498 passenger-side exhaust manifold kit is aimed at owners and technicians working on affected Jeep Wagoneer and Ram 1500 vehicles who need a direct-fit replacement that addresses thermal-cycle cracking. If your vehicle shows exhaust leaks, unusual noise from the right-side manifold area, or you’re replacing a warped or cracked OEM manifold, this OE Fix kit provides a strengthened, ready-to-install alternative. Always verify vehicle-year and trim compatibility with the fitment tool before purchase.