Dorman Exhaust Manifold Kit — Passenger Side for Jeep Wagoneer & Ram 1500, Ceramic-Coated Reinforced Flanges

Dorman's Improved Design Patent Pending 674-498 passenger-side exhaust manifold kit replaces the factory manifold on select Jeep Wagoneer and Ram 1500 models with a strengthened, ceramic-coated unit that includes required gaskets and hardware.

Many late-model Jeep Wagoneer SUVs and Ram 1500 pickups experienced exhaust manifold damage linked to cylinder deactivation thermal cycling. Dorman engineered this OE Fix replacement to address the common causes of warping and cracking by reinforcing key flange areas, adding a ceramic coating for even heat distribution, and supplying all necessary gaskets and hardware for a direct-fit installation. Before purchasing, confirm vehicle compatibility using the garage tool and the Confirmed Fit indicator.

How does this Dorman manifold reduce the risk of cracking?

The 674-498 uses mechanical reinforcements and improved materials to withstand uneven heating from cylinder deactivation systems. The integrated upper flange and thicker lower flange help resist bending and stress that lead to cracks.

• Integrated upper flange strengthens manifold sides against thermal stress
• Thicker lower flange provides improved sealing and structural support
• Ceramic coating promotes consistent heat distribution across the casting
• Precision machining for a leak-minimizing fit to the cylinder head and downpipe

Will this part install like the original equipment manifold?

This Dorman kit is designed for direct replacement of the right-side (passenger) manifold on specified Jeep Wagoneer and Ram 1500 model years. The kit ships with the gaskets and hardware needed for a like-for-like swap, though verify any vehicle-specific notes in the fitment tool before starting work.

• Includes required gaskets and installation hardware for timely replacement
• Manufactured to match OE mounting dimensions and port alignment
• Recommended to check the Confirmed Fit tool entry and any fitment notes
• Professional or experienced DIY installation advised to ensure proper torque and sealing

What performance or longevity benefits can I expect?

While not a tuning part, this manifold is intended to restore reliable, leak-free exhaust flow and resist the common failure modes of the original design. The combination of stronger flanges and ceramic coating helps the unit maintain dimensional integrity under repeated thermal cycles.

• Helps prevent exhaust leaks that affect drivability and emissions system performance
• Improved durability compared with manifolds that have warped or cracked
• Ceramic finish reduces hot spots for more even thermal expansion
• Backed by Dorman product support and over a century of automotive experience

How do I confirm this manifold fits my vehicle?

Fitment depends on model year and engine options; the replacement fits specific Jeep Wagoneer and Ram 1500 years listed below. Use the garage tool on the product page and look for the Confirmed Fit bar; hover any blue “i” icon to read possible fitment caveats before ordering.

• Compatible Jeep Wagoneer: 2022, 2023
• Compatible Ram 1500: 2019, 2020, 2021, 2022, 2023, 2024
• Enter vehicle trim in the garage tool for accurate confirmation
• Contact support if the tool shows an information icon with special notes

Who is this for: This Dorman 674-498 passenger-side manifold kit is aimed at owners and technicians repairing exhaust leaks, warped flanges, or cracked manifolds on the listed Jeep Wagoneer and Ram 1500 model years. It suits DIY mechanics with the right tools and experience and professional shops that need a reliable OE-style replacement engineered to resist the thermal stresses common to cylinder deactivation-equipped engines.