Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
If you drive a Ram 3500, choosing the right exhaust manifold can affect engine efficiency, noise, and long-term durability. You want a unit that fits correctly, resists heat-related warping or cracking, and maintains a reliable seal under heavy use. This guide highlights seven shortlisted options that met our editorial standards across the key performance and durability measures buyers care about. Below we summarize how we evaluated fitment, thermal performance, sealing, and longevity, then present the top picks to consider.
Looking for other parts? See all Ram 3500 parts & accessories.
Top Picks at a Glance
| Best overall The best all-around choice for most situations | Dorman 674-906 Driver Side Exhaust Manifold Kit with Gaskets and Hardware |  |
| Best quality Built to a higher standard if you want something more solid | JJ OriginalEquipment Exhaust Manifold Pair for 2003–2008 5.7L Hemi Dodge Ram |  |
| Best Value The sweet spot between price and what you get | Dorman 674-732 Passenger Side Exhaust Manifold Kit (includes gaskets and hardware) |  |
| Best budget The cheapest option that still gets the job done reliably | PartsFlow Right Exhaust Manifold for Dodge/Ram 1996–2003 (674-538) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Dorman 674-922 Driver Side Exhaust Manifold Kit with Gaskets and Hardware |  |
| Most popular A crowd favorite that many people choose with confidence | A-Premium Right Side Engine Exhaust Manifold Kit with Gasket, Bolts & Nuts |  |
| Best Seller A high-volume bestseller chosen again and again | A-Premium Right Side Exhaust Manifold Kit for 6.7L Cummins (Ram 3500/4500/5500) |  |
1. Dorman 674-906 Driver Side Exhaust Manifold Kit with Gaskets and Hardware
| Manufacturer | Dorman Products |
|---|---|
| Model | Dorman 674906 Exhaust Manifold |
| Exterior | Machined |
| OEM Part Number | 101547; 53032197AE; 53032197AY |
This Dorman driver-side exhaust manifold is a direct-replacement kit designed to restore proper exhaust sealing and flow on compatible Dodge Ram trucks. It ships with the gaskets and downpipe hardware you need for a single repair, so you can replace a cracked or warped manifold without sourcing parts separately. The part is machined to match factory mating surfaces, which helps achieve a solid seal and reduces exhaust ticking and the downstream effects that can foul O2 sensors or trigger engine running issues. Installation is straightforward for a competent DIYer or shop and most users report a close fit to the factory part. Some buyers have noted variations in the included fasteners and occasional missing small items in a kit, so check the hardware bag and have a set of replacement bolts or washers on hand before beginning. The kit focuses on practical, cost-effective repair rather than performance gains, making it a sensible choice when the goal is a reliable factory-quality replacement.
Best for: Balanced all-round buyers who want a reliable, cost-conscious factory-quality repair solution for a Ram 3500 driver-side exhaust manifold and prefer a single-kit replacement that simplifies the job.
Less Ideal for: Not ideal for owners seeking performance headers or significant horsepower gains or for those who need a passenger-side manifold instead of the driver-side kit.
- Includes gaskets and downpipe hardware for a complete single-side repair
- Machined mating surfaces intended to match factory fit and function
- Durable construction aimed at resisting warping and cracking
- Widely reported to fit specified Ram trucks with minimal modifications
- Some kits have had missing or incorrectly sized fasteners requiring replacement hardware
- Not a performance-upgrade part; designed for restoration to factory-level function
Verdict: A practical, factory-style driver-side manifold kit for Ram 3500 owners who want a complete, lower-cost repair that restores proper exhaust sealing.
2. JJ OriginalEquipment Exhaust Manifold Pair for 2003–2008 5.7L Hemi Dodge Ram
| Fitment | 2003–2008 Dodge Ram 1500/2500/3500 5.7L Hemi |
|---|---|
| Manufacturer | JJ OriginalEquipment |
| Manufacturer Part Number | EX2191R+EX2192L |
These JJ OriginalEquipment manifolds arrive as a complete left and right replacement set for 2003–2008 Ram trucks with the 5.7L Hemi V8. They are intended as direct factory-replacement manifolds to restore exhaust routing and clear worn or cracked original pieces. Installation is typical for manifold swaps: remove the old manifolds, transfer or replace gaskets and studs as needed, and bolt the new pair in place. The listing specifies common replacement part numbers so fitment matches factory locations for the Ram 3500 in that model range. Practical benefits include having both sides replaced at once to eliminate cross-leaks and a straightforward bolt-on fit that can get a tired exhaust system back to proper sealing and performance. Limitations are the aftermarket nature of the parts, which can mean variability in gasket fitment and surface finish compared with factory parts, so expect to check mating surfaces and use quality gaskets and fasteners during installation. These are best used as a functional, cost-effective factory-replacement option rather than a high-end performance header upgrade.
Best for: Performance-oriented owners who prioritize restoring reliable, factory-grade exhaust sealing on a Ram 3500 with a tired or damaged 5.7L Hemi, and who prefer a straightforward replacement over custom headers.
Less Ideal for: Buyers seeking a true performance upgrade or significant horsepower gains should look at aftermarket performance headers and tuned exhaust systems instead.
- Sold as a matched left and right pair for full replacement
- Direct-fit design specified for 2003–2008 5.7L Hemi Ram trucks to simplify installation
- Covers common OEM part numbers for straightforward parts matching
- Restores proper exhaust sealing to eliminate manifold leaks when installed correctly
- Aftermarket build may show variability in gasket surface finish requiring careful mating and new gaskets
- Not a performance header so will not materially increase horsepower or exhaust flow beyond stock
Verdict: A practical, matched left/right aftermarket manifold pair for restoring factory exhaust sealing on 2003–2008 Ram 3500 5.7L Hemi trucks, but not a performance upgrade.
3. Dorman 674-732 Passenger Side Exhaust Manifold Kit (includes gaskets and hardware)
| Installation Type | Bolt-On |
|---|---|
| Automotive Fit Type | Vehicle Specific Fit |
| Exterior | Machined |
| Position | Center |
| Bolt Pattern (Number of Holes) | 7 |
This Dorman manifold kit replaces a warped or cracked factory passenger-side exhaust manifold with a heavier-duty ductile iron unit and ships with the main gaskets and some mounting hardware. It is used as a bolt-on repair to stop exhaust leaks and restore proper exhaust routing on affected engines. The kit is reverse-engineered from factory parts for a close fit and is designed and tested in the United States. Practical benefits include improved resistance to heat-related warping compared with lower-grade cast iron, and fewer separate parts to source since gaskets and studs are included. Hands-on installers note it fits well on compatible V8 trucks with occasional minor trimming or replacement of the supplied gasket/fasteners for best results. Limitations are that the included gasket quality and quantity of fasteners may not satisfy every repair, so planning to buy higher-quality gaskets and fresh bolts is common, and some fitment tweaking can be required on older, corroded engines.
Best for: A practical optimizer seeking the best value repair for a Ram 3500 who prioritizes a durable, close-to-factory replacement without paying OEM prices.
Less Ideal for: Owners who want a perfect out-of-the-box OEM-equivalent with every high-end fastener included or those unwilling to do light fitment work should consider higher-spec options or dealer parts.
- Ductile iron construction resists heat and warping better than lower-grade cast alternatives.
- Includes manifold gasket, flange gaskets, studs and nuts for a more complete repair package.
- Reverse-engineered to match factory fitment for straightforward bolt-on installation.
- Designed and tested domestically, which supports consistent manufacturing quality.
- Supplied gasket and some flange hardware are described by users as lower quality and often replaced.
- May require minor grinding or trimming on some engines for clearance with nearby sensors or mounts.
Verdict: A rugged, budget-conscious replacement manifold that restores function and resists warping but plan to upgrade gaskets and some fasteners for a truly long-lasting repair.
4. PartsFlow Right Exhaust Manifold for Dodge/Ram 1996–2003 (674-538)
| Manufacturer | PartsFlow |
|---|---|
| Manufacturer Part Number | 14ZA-AHA |
| OEM Part Number | 674-538, 53030873 |
| Placement on Vehicle | Right |
This PartsFlow right-side exhaust manifold is a straightforward replacement intended for late 1990s to early 2000s Dodge and Ram trucks, including Ram 3500 models from the specified years. It bolts to the cylinder head to collect exhaust gases from the right bank and direct them into the exhaust system. Typical installation is direct-fit with factory mounting points and OEM-style ports so it can be swapped in during a repair or exhaust rebuild without major modifications. The listing highlights ISO/TS16949-certified manufacturing and a one-year support warranty, which suggests consistent manufacturing controls and basic post-sale protection. Practical benefits include restoring exhaust routing and eliminating leaks from a cracked or warped manifold at a lower cost than many name-brand replacements. Limitations are that this is a budget aftermarket unit so finish, surface machining, or long-term thermal durability may not match higher-end factory-quality manifolds, and buyers should expect to inspect flange flatness and use new gaskets and hardware during installation.
Best for: Practical, budget-conscious owners who prioritize affordable, functional repairs to keep an older Ram 3500 running without spending on premium parts.
Less Ideal for: Those seeking the highest durability or upgraded performance exhaust solutions who prefer heavy-duty or performance-manufactured manifolds should consider higher-end alternatives.
- Direct-fit replacement for specified Dodge and Ram right-side applications, simplifying installation
- Produced under ISO/TS16949-certified processes indicating consistent manufacturing standards
- Includes manufacturer part numbers to aid correct fitment matching for older Ram 3500 models
- Budget aftermarket finish and materials may offer lower long-term thermal resistance compared with premium factory-quality manifolds
- Limited longevity data and minimal customer feedback available for long-term reliability
Verdict: A cost-focused, direct-fit right-side replacement that restores exhaust function on compatible Ram 3500 trucks, but without premium long-term durability assurances.
5. Dorman 674-922 Driver Side Exhaust Manifold Kit with Gaskets and Hardware
| Manufacturer | Dorman Products |
|---|---|
| Model | 674-922 |
| Position | Center |
This Dorman driver-side exhaust manifold is sold as a complete repair kit that replaces the factory manifold on supported Ram and Dodge 5.7 applications. It is engineered to match the fit and basic function of the original part and ships with gaskets and downpipe hardware so you can do a one-stop repair. In real-world use it bolts into place cleanly in most installs and restores a quiet, sealed exhaust where the factory unit had failed. Practical benefits include lower cost than factory parts and having all necessary gaskets in the box, which reduces trips to the parts counter. Reported limitations include inconsistent hardware fitment and thin gasket quality in some shipments, and a few customers found the exhaust flange holes differently threaded than factory which required sourcing alternative bolts. Expect a straightforward replacement for reliability-focused repairs, but plan on checking the supplied bolts and gasket before assembly and keep spare fasteners on hand if needed.
Best for: Reliability-focused owners seeking an affordable, ready-to-install replacement to restore quiet operation and stop exhaust leaks on Ram 3500 trucks without chasing multiple parts.
Less Ideal for: Buyers who want exact factory-sourced parts with guaranteed identical hardware or who prefer vendor support that supplies matching fasteners out of the box should consider a different supplier.
- Complete kit includes manifold, gaskets, and downpipe hardware for a single-order repair
- Designed to match factory fit and restore sealed exhaust performance
- Lower cost than equivalent factory replacement parts
- Some units shipped with poor-quality gaskets or damaged gaskets
- Included flange bolts may not match factory hole threading or have insufficient thread length
- Occasional reports of missing or incorrect hardware in the kit
Verdict: A budget-friendly, complete driver-side manifold kit that restores sealed exhaust performance on supported Ram/Dodge applications.
6. A-Premium Right Side Engine Exhaust Manifold Kit with Gasket, Bolts & Nuts
| Material | Cast Iron |
|---|---|
| Fitment | Ram 3500 passenger side V8 5.7L and 6.4L |
| Includes | Exhaust manifold, inlet gasket, bolts, nuts, heat shield |
| Manufacturer Part Number | APEMD181D |
This A-Premium right-side manifold is a direct-replacement cast-iron unit intended for Ram 3500 trucks with V8 Hemi engines and is sold as a kit with a gasket, a pair of bolts and nuts, and a heat shield. It is typically used to fix warped or cracked passenger-side manifolds that cause the familiar Hemi ticking and exhaust leaks. The cast-iron construction offers good heat resistance and rigidity consistent with factory-style parts, and buyers report the manifold fits the 3500 flange pattern without major modification. Practical benefits include restoring normal exhaust sealing and reducing ticking noise, and the included heat shield simplifies a like-for-like swap. Important limitations: some users found the supplied gasket missing bolt holes or the fasteners too short, so plan to have replacement bolts, studs, or a correct gasket on hand for a smooth install. If broken studs are present in the head, extraction can become time consuming and may require professional tools or shop labor.
Best for: Convenience-driven Ram 3500 owners who want a ready-made passenger-side replacement to stop exhaust ticking and restore normal operation with minimal parts hunting.
Less Ideal for: Owners who prefer a guaranteed parts-for-parts OEM match or who expect every mounting fastener and stud to be included should consider a factory-quality replacement or have hardware on hand before starting the repair.
- Cast-iron construction provides high temperature resistance and structural strength similar to factory manifolds
- Includes gasket, bolts, nuts and heat shield for a mostly complete passenger-side replacement
- Designed as a direct replacement to match Ram 3500 passenger-side fitment for V8 5.7L and 6.4L engines
- Many owners report it cures the common Hemi ticking caused by manifold leaks or warped flanges
- Supplied gasket may not include all bolt holes for some applications requiring a separate gasket
- Included bolts have been reported as too short, so replacement fasteners may be needed
- Does not include manifold studs, which can complicate installation if studs are broken
Verdict: A cost-effective, cast-iron passenger-side manifold kit that restores sealing and quiets the Hemi tick but bring your own gasket, bolts, or studs to avoid installation hiccups.
7. A-Premium Right Side Exhaust Manifold Kit for 6.7L Cummins (Ram 3500/4500/5500)
| Fitment | Ram 3500/4500/5500 with 6.7L L6 (specified years) |
|---|---|
| Material | Stainless Steel |
| Included | 1x Exhaust Manifold |
| Part Numbers | 674562, 674-562, 68205983AA |
This right-side exhaust manifold is a direct-replacement part engineered for Ram trucks with the 6.7L inline-six engine. It is used to channel exhaust gases from the cylinder head into the turbo and downstream exhaust, restoring proper exhaust flow when a cracked or leaking factory manifold is removed. Constructed from stainless steel and built to the manufacturer reference numbers, the manifold is presented as a factory-style replacement that simplifies installation for professional mechanics or experienced DIYers. The product notes include a stronger box for shipping and a one-year unlimited-mileage guarantee, which helps mitigate risk if fitment issues arise. Practical benefits are straightforward: improved sealing at the exhaust port, resistance to high temperature, and a direct replacement that keeps the engine running smoothly. Limitations to be aware of include strict fitment requirements across Ram heavy-duty model years and engine design variations, so confirm reference numbers and engine design before ordering to avoid returns and installation delays.
Best for: A risk-averse mainstream buyer who prioritizes a factory-like replacement and warranty backing when repairing exhaust components on Ram 3500-series trucks.
Less Ideal for: Drivers who need a universal or modified performance manifold or those unwilling to verify exact engine reference numbers before purchase should look elsewhere.
- Factory-style direct replacement simplifies installation for experienced installers
- Stainless steel construction resists high-temperature corrosion for longer service life
- Packaged in a reinforced box to reduce shipping damage during transit
- Fitment is specific to certain model years and engine design so wrong selection will require return
- Heat shield is not included, which may be needed in some installations
Verdict: A factory-style stainless steel right-side manifold aimed at buyers seeking a direct replacement for specific 6.7L Ram heavy-duty engines, but confirm fitment closely before ordering.
Choosing the Right Ram 3500 Exhaust Manifold: Key Factors to Consider
Fitment and Flange Alignment
Accurate fitment governs whether a manifold will bolt up without adaptation. Flange shape, bolt hole pattern, and port alignment must match the engine head to avoid gaps that lead to leaks or stress on fasteners. Poor alignment often requires modification or additional gaskets, which increases installation complexity and the chance of future failures.
When evaluating options, check for documented compatibility with the Ram 3500 head and for precision-machined flanges. Even small misalignments can cause exhaust leaks or uneven stress distribution that accelerates cracking, so prioritize parts that specify exact fitment to your model year and engine.
Material and Thermal Resistance
Materials affect how a manifold handles repeated heating and cooling cycles. Cast iron resists corrosion and dampens noise but can be heavier and more brittle under extreme thermal shock. Stainless steel offers better resistance to rust and can tolerate higher surface temperatures, but lower-grade alloys may still warp if not designed for the application.
Consider the expected operating temperatures of a Ram 3500 under load and choose a construction that balances thermal expansion characteristics with toughness. Good thermal resistance reduces the likelihood of cracks forming over time and improves long-term sealing stability.
Gasket Interface and Sealing Design
A reliable seal at the flange and header pipe junction is critical to prevent exhaust leaks that can reduce performance and create noise. Gasket material and the clamping method affect how well the joint maintains compression through thermal cycles. Some designs use multi-layer steel gaskets or integrated sealing rails to improve longevity.
Examine whether the manifold design accommodates quality gaskets and whether bolt access allows proper torqueing. A design that facilitates even clamping pressure and resists blowouts will reduce the chance of leak-related symptoms.
Heat Management and Shielding
Manifolds operate near high-temperature components, and unmanaged heat can damage nearby sensors, wiring, and turbocharger components. Heat shields, coatings, or integrated thermal barriers help control radiant heat and protect surrounding parts. Surface treatments like ceramic coatings can lower under-hood temperatures and reduce corrosion risk.
If you frequently tow or operate under heavy loads, prioritize manifolds with proven heat-control features. Effective heat management also reduces stress on the manifold itself, lowering the chance of cracks from repeated thermal cycling.
Durability and Resistance to Cracking
Cracks in the manifold lead to exhaust leaks, decreased performance, and exhaust gas intrusion into the engine bay. Durability depends on material quality, wall thickness, and how the part handles vibration and thermal stress. Designs that reduce stress concentrations around ports and bolts tend to last longer.
Look for manifolds with reinforced areas around high-stress points and with manufacturing processes that ensure consistent wall thickness. Robust construction minimizes the need for premature replacement or repairs caused by cracks.
Ease of Installation and Serviceability
Installation complexity affects labor time and the potential for installation errors. Factors such as access to fasteners, need for supplemental parts like gaskets or studs, and whether common hand tools suffice will determine how straightforward the swap or replacement is. Some manifolds require removal of adjacent components to reach mounting bolts, increasing installation time.
Consider whether the part comes with clear instructions or hardware provisions that ease installation. Designs that allow for straightforward torque sequences and accessible fastener locations reduce the risk of installation-related leaks and simplify future maintenance.
How We Chose the Best Ram 3500 Exhaust Manifold
We focused on components that deliver reliable fitment and withstand the high-heat environment typical of heavy-duty Ram 3500 use. Our selection criteria emphasized flange and bolt pattern accuracy, thermal stress resistance, and material choice to limit warping and cracking. We also evaluated gasket interface quality, provision for heat shielding where applicable, and how easily the part integrates with stock exhaust and turbocharger locations. Durability under load, corrosion resistance, and ease of installation were assessed to reflect real-world maintenance needs.We excluded parts lacking clear fitment data or those designed for substantially modified engines that would not match stock mounting points. Also removed were manifolds with insufficient information on materials or thermal tolerances. The result is a group of candidates that balance correct fit, sealing performance, and long-term robustness for Ram 3500 owners seeking trustworthy replacements or upgrades.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common exhaust manifold symptoms to watch for on a Ram 3500?
Common signs include a ticking or tapping noise from the engine bay that varies with RPM, reduced engine smoothness, and noticeable exhaust odor near the cabin. You may also see decreased fuel efficiency or a drop in performance under load. These symptoms often indicate a leak or compromised seal at the manifold interface.
How do I diagnose an exhaust manifold leak on a Ram 3500?
Diagnosing often starts with a careful visual inspection for cracks, soot, or damaged gaskets around the flange. When the engine is cold, check for loose bolts or visible gaps. Running the engine briefly while listening for a distinct exhaust leak sound and feeling for escaping gases near the manifold can help confirm a leak. For more precision, a smoke test or using a stethoscope-like tool can pinpoint the source.
Can a cracked exhaust manifold be repaired or does it need replacement?
It depends on the crack size, location, and material. Small, accessible cracks in some materials can sometimes be welded or patched, but weld repairs may not restore original strength or thermal behavior. For many heavy-duty applications, replacement is the more reliable long-term solution because it restores proper sealing and structural integrity.
How does the exhaust manifold gasket affect long-term performance?
The gasket creates the primary seal between the manifold and the engine head. A durable gasket that tolerates high temperatures and maintains clamping pressure reduces the chance of leaks and maintains engine efficiency. Over time gaskets can degrade from heat cycling and corrosion, so using a gasket designed for heavy-duty conditions helps preserve performance and reduces maintenance frequency.
Is installing a replacement manifold a difficult job for a DIYer?
Difficulty varies with the specific vehicle year and engine layout. Some installations are straightforward if fasteners are accessible and no major components must be removed. However, seized bolts, tight clearances, or required torque sequences can complicate the task. Many owners opt for professional help if they lack experience or specialized tools.
What trade-offs should I consider between OEM and aftermarket manifold options?
OEM parts are typically designed for direct fit and predictable performance, while aftermarket options may offer different materials or improved heat management. The trade-offs involve fit certainty versus potential gains in durability or thermal control. Evaluate the quality of materials, whether the design maintains correct flange alignment, and if the part suits your intended use before choosing.
Conclusion
When choosing a Ram 3500 exhaust manifold, prioritize correct fitment, heat resistance, and a reliable gasket interface. Those factors most influence leak prevention, longevity, and consistent engine performance. Also weigh ease of installation and whether the design includes heat-control features if you use the truck for heavy towing or long periods under load.Balancing these considerations helps you decide between a straightforward replacement and an option that offers greater thermal durability. Focus on the factors above to select a manifold that meets your durability and serviceability needs.
Explore More:
- Check out all Ram 3500 parts & accessories
- Explore Exhaust Manifolds Maintenance & Repair Guides
- Explore Exhaust & Emissions
- Browse all Auto Parts
