Dorman Passenger-Side Exhaust Manifold Kit for Ram Trucks — Direct-Fit with Gaskets & Downpipe Hardware

Dorman 674-685 passenger-side exhaust manifold kit is a direct-fit replacement that ships with the required gaskets and downpipe hardware to restore exhaust routing on compatible Ram trucks.

If your Ram’s passenger-side manifold shows signs of leakage, warping or age-related wear, this Dorman kit provides the parts needed for a complete replacement without sourcing separate components. Designed to match the original manifold’s fit and mounting points, the assembly and included gasket set simplify installation and reduce the risk of exhaust leaks when installed to factory specifications. Verify vehicle compatibility—this kit covers a range of Ram 1500, 1500 Classic, 2500, 3500, 4000 and Ram Pickup model years listed below—by entering your exact trim in the vehicle fitment tool before purchasing.

How does this manifold kit match the original equipment fit?

The Dorman 674-685 is engineered to replicate the shape, bolt pattern and flange orientation of the factory passenger-side manifold. That close dimensional match helps the part align with exhaust ports and downpipe hardware, reducing installation adjustments and potential exhaust leaks. Materials and manufacturing tolerances target the same functional layout as the original component.

• Direct-fit flange and bolt-hole patterns
• Preformed ports sized for factory exhaust exits
• Includes downpipe bolts and required gaskets for a complete assembly

What installation components are included in the kit?

This kit arrives with all gaskets and the downpipe fasteners necessary to complete the passenger-side manifold swap. Having those parts included prevents delays caused by missing hardware and ensures sealing surfaces are renewed at the time of install. Follow vehicle torque and installation guidelines to achieve a secure, leak-free connection.

• Passenger-side exhaust manifold assembly
• Exhaust gaskets sized for each port
• Downpipe hardware (bolts/nuts/studs as required)

Which Ram models and years does the Dorman 674-685 fit?

The kit supports a range of Ram trucks from select model years; fitment depends on engine and trim. Always confirm with the product fitment tool using your full vehicle details to avoid mismatches. Listed compatible model years include several Ram 1500, 1500 Classic, 2500, 3500, 4000 and Ram Pickup entries.

• Ram 1500 Classic: 2019–2020
• Ram 1500: 2013–2018
• Ram 2500: 2014–2020
• Ram 3500: 2013–2020; Ram 4000: 2019–2020; Ram Pickup: 2014

How does the construction help long-term performance?

Dorman manufactures this manifold with materials and processes intended to resist common failure modes such as warping and cracking under heat cycles. While service life depends on operating conditions and maintenance, the included gaskets and appropriate hardware help reduce the chance of exhaust leaks right after installation. Proper installation and periodic inspection extend reliable operation.

• Durable materials to resist heat-induced distortion
• Factory-style sealing surfaces included to minimize leaks
• Designed for routine replacement intervals and repairs

Who is this for: This Dorman 674-685 passenger-side manifold kit is aimed at mechanics, DIY truck owners and repair shops working on compatible Ram trucks who want a direct-fit aftermarket replacement that includes gaskets and downpipe hardware. Choose this kit if you need a complete, ready-to-install passenger-side manifold solution to restore exhaust sealing and routing on the specified Ram model years—just confirm your exact trim and engine with the fitment tool before ordering.