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If you own a Ram 2500 with the HEMI engine, the exhaust manifold is a small part that can have an outsized impact on performance, drivability, and long-term reliability. Worn, cracked, or poorly fitting manifolds lead to noise, reduced power, and increased under-hood heat, so choosing the right replacement or upgrade matters for everyday driving and towing.This guide covers our five shortlisted exhaust manifolds that suit the Ram 2500 HEMI, focusing on fitment, heat management, and long-term durability. Below you will find clear evaluation criteria and practical guidance to help you decide between direct-fit replacements and performance-oriented options. Read on for installation considerations and maintenance tips before the product list.
Looking for other parts? See all Ram 2500 parts & accessories.
Top Picks at a Glance
| Best Value The sweet spot between price and what you get | TRQ Exhaust Manifold and Gasket Kit, Left & Right, 2-Piece |  |
| Best Budget The cheapest option that still gets the job done reliably | A-Premium Right Side Exhaust Manifold Kit with Gasket, Bolts and Nuts |  |
| Highest Rated A top-rated pick with lots of positive feedback | ZHRUIHAN Exhaust Manifold Kit with Gaskets and Hardware for 5.7L Hemi |  |
| Most Popular A crowd favorite that many people choose with confidence | Dorman 674-685 Passenger Side Exhaust Manifold Kit with Gaskets and Hardware |  |
| Best Seller A high-volume bestseller chosen again and again | BD Diesel Exhaust Manifold Kit for 5.7L HEMI (2009–2022) |  |
1. TRQ Exhaust Manifold and Gasket Kit, Left & Right, 2-Piece
| Manufacturer | TRQ |
|---|---|
| Model | TRQ EXA51512 |
| Position | Left, Right |
| OEM Part Number | 5045486AA, 53034137AC, 68045559AA, 68045559AB, 68045559BA |
This TRQ kit includes left and right cast exhaust manifolds plus gaskets intended as direct replacements for 5.7L HEMI Ram pickups from the 2013–2018 era (with the 2018 units limited to production dates through 6/04/18). It is aimed at garage DIYers or shops that need a full-manifold swap rather than piecing together separate parts. The manifolds are sold as a matched pair and come pre-machined, which helps alignment and reduces fitment work during installation. Practical benefits include full coverage for both banks in one purchase and factory-style fitment that simplifies gasket mating and bolt alignment. Because the kit targets a specific engine and production-window fit, confirm vehicle production date before ordering. Buyers should also plan for standard manifold installation tasks such as removing heat shields, dealing with seized fasteners, and retorquing to spec, since the kit does not include installation hardware beyond the manifolds and gaskets.
Best for: Practical buyers who want a straightforward, matched-pair replacement for both exhaust banks on 5.7L HEMI Rams and prefer a DIY- or shop-friendly product that minimizes fitment guesswork.
Less Ideal for: If you only need a single-side repair, a dedicated single manifold or remanufactured option may be a better, lower-cost choice.
- Includes both driver and passenger manifolds and gaskets for a complete bank replacement
- Pre-machined surfaces for easier alignment and tighter gasket sealing
- Designed to match factory fit for the 5.7L HEMI Ram 2013–2018 (production-date limited) which reduces modification
- Sold as a two-piece set so both sides are matched and can be replaced at the same time
- Fitment is limited to specific production dates for 2018 models so it may not suit all 2018 Ram trucks
Verdict: Buy this kit if you need a matched, factory-fit replacement pair for both exhaust banks on a 5.7L HEMI Ram from 2013–2018 to simplify a full-manifold swap.
2. A-Premium Right Side Exhaust Manifold Kit with Gasket, Bolts and Nuts
| Material | Cast Iron |
|---|---|
| Fitment Type | Direct Replacement |
| Includes | Manifold, inlet gasket, bolts and nuts |
| Heat Shield | Yes |
This A-Premium right-side exhaust manifold is a direct-replacement cast-iron unit sold as a kit with an inlet gasket and basic fasteners. It is intended for Ram trucks with the 5.7L or 6.4L HEMI V8 and is used to restore a cracked or leaking manifold without replacing additional exhaust components. The cast-iron construction provides high temperature resistance and should resist warping under normal operating conditions, while the included heat shield and gasket simplify installation compared with buying parts separately. Because the kit is offered as a basic replacement, expect an economical fit-and-forget repair rather than performance gains. Installation is straightforward for a competent DIYer or a shop familiar with Ram exhaust work, but buyers should verify the exact year/engine designation before ordering since fitment covers specific model years and engine codes. If you need a heavy-duty upgrade or a performance header, this is not that part, but for budget repairs it supplies the essential components to get a HEMI back to factory-quality operation.
Best for: Budget-minded Ram owners who need a straightforward, factory-style replacement to fix a cracked or leaking HEMI exhaust manifold and prefer a ready-to-install kit over sourcing parts separately.
Less Ideal for: Anyone looking for a performance header or a high-flow aftermarket upgrade should choose a purpose-built performance manifold instead.
- Cast-iron construction offers strong heat resistance and durability
- Includes inlet gasket and basic bolts and nuts for a more complete replacement
- Designed as a direct replacement to match factory fit and mounting points
- Heat shield included to help protect surrounding components and reduce heat soak
- Basic kit does not improve flow or performance compared with factory or performance manifolds
- Fitment is limited to specific Ram model years and engine designations so verification is required
Verdict: A cost-conscious, factory-style cast-iron manifold kit that gives Ram HEMI owners an economical way to restore a leaking or damaged right-side exhaust manifold.
3. ZHRUIHAN Exhaust Manifold Kit with Gaskets and Hardware for 5.7L Hemi
| Brand Name | ZHRUIHAN |
|---|---|
| Manufacturer Part Number | FDJQG-0049 |
| OEM Equivalent Part Number | 1041463 |
| Automotive Fit Type | Vehicle Specific Fit |
This ZHRUIHAN exhaust manifold kit replaces the factory manifold on 5.7L Hemi Ram trucks and ships with the gaskets and mounting hardware needed for installation. Built from solid metal intended to resist heat, warping, and corrosion, it routes exhaust gases away from the engine to restore proper exhaust flow and engine performance. Typical use is direct replacement of a cracked or leaking manifold during repair or maintenance; the included gaskets simplify installation and reduce the need to source extra parts. The kit is marketed as vehicle-specific fit for 2009-2018 Ram 2500 5.7L applications and is presented as durable for high-temperature exhaust service. Expect straightforward bolt-on replacement for someone with basic mechanical skills, though heavy-duty shop tools may still be required to remove rusted fasteners. The main limitations are that this is a direct replacement rather than a performance upgrade and you should verify fit with your exact model year and cab/engine configuration before buying.
Best for: Buyers who prioritize a durable, direct replacement to restore reliable exhaust function on a 5.7L Hemi Ram and who want a kit that includes the gaskets and hardware to minimize parts hunting.
Less Ideal for: Shoppers looking for increased power, improved flow tuning, or aftermarket performance headers should consider dedicated performance options instead.
- Includes required gaskets and mounting hardware for a more complete repair
- Constructed from solid metal to resist high temperatures and reduce warping
- Designed as a vehicle-specific fit for 5.7L Hemi Ram applications to simplify installation
- Aims to restore proper exhaust routing to recover engine performance and efficiency
- Not a performance-oriented manifold; it is a factory-style replacement
- Fitment must be confirmed for specific model years and configurations before purchase
Verdict: Choose this kit when you need a solid, vehicle-specific replacement that comes with gaskets and hardware to quickly restore reliable exhaust function on a 5.7L Hemi Ram.
4. Dorman 674-685 Passenger Side Exhaust Manifold Kit with Gaskets and Hardware
| Included Components | 1 Exhaust Manifold; 1 Inlet Gasket; 2 Bolts; 2 Nuts |
|---|---|
| Installation Type | Bolt-On |
| Automotive Fit Type | Vehicle Specific Fit |
| Compatible with Vehicle Type | Truck |
This Dorman passenger-side exhaust manifold kit is a bolt-on replacement designed to match the fit and function of the factory manifold for specified Ram models with HEMI engines. It arrives with the inlet gasket and downpipe hardware so you can complete the repair in one visit to the garage, which saves time compared with sourcing parts separately. The manifold is engineered to resist warping and cracking and is reverse-engineered from factory parts to simplify installation. Typical use is a like-for-like repair after manifold failure or leak, and it supports a straightforward swap for technicians or experienced DIYers. Practical benefits include having all required components in the box and a design intended to reduce exhaust leaks and restore performance. Limitations are that fitment is vehicle-specific so you must confirm year and trim before buying, and this is an aftermarket replacement rather than a factory part which may differ slightly in appearance or material from the original.
Best for: Buyers who want a single-order, repair-ready replacement that installers and experienced DIYers can fit quickly to restore exhaust integrity on compatible Ram HEMI trucks.
Less Ideal for: Those seeking an original factory-manufactured part or who have an uncommon trim where exact fitment is uncertain should consider other options.
- Includes inlet gasket and downpipe hardware for a complete repair in one purchase
- Bolt-on, vehicle-specific fit simplifies installation
- Engineered to resist warping and cracking for longer service life
- Reverse-engineered from factory parts to match fit and function
- Aftermarket design may differ in appearance or material from the factory manifold
Verdict: If you need a ready-to-install passenger-side manifold for supported Ram HEMI trucks, this Dorman kit delivers the parts and fit to complete the repair without extra orders.
5. BD Diesel Exhaust Manifold Kit for 5.7L HEMI (2009–2022)
| Fitment years | 2009–2022 |
|---|---|
| Engine | 5.7L HEMI |
| Material | High-silicon ductile iron |
| Includes | Gaskets and fasteners |
This BD Diesel exhaust manifold kit is a direct replacement for 2009–2022 5.7L HEMI Dodge/Ram trucks (does not fit 2019+ DT body style) intended to address common failure points in factory manifolds. The kit uses high-silicon ductile iron and a thicker casting to resist warping from heat, and it includes longer fasteners with spacers plus independent heat shield mounting to reduce stress on the studs during thermal cycling. In practice that means easier, longer-lasting installs and fewer repeat repairs compared with brittle or thin factory manifolds. The kit ships with the necessary gaskets and fasteners for a straightforward swap. On the downside this is a direct-fit replacement rather than a performance header, so you should not expect measurable horsepower gains; it is focused on durability and reliability. Installation still requires routine mechanical skills and proper torqueing to realize the longevity benefits.
Best for: Buyers prioritizing a durable, factory-style replacement who want to prevent repeat exhaust manifold failures and minimize future garage time.
Less Ideal for: Enthusiasts seeking horsepower gains or custom exhaust tuning should look at aftermarket headers or performance exhaust options instead.
- High-silicon ductile iron construction improves resistance to warping and cracking
- Includes longer fasteners and spacers to reduce stud failures from thermal expansion
- Independent heat shield mounting reduces load on exhaust bolts and improves durability
- Kit includes gaskets and fasteners for a complete, direct-fit replacement
- Does not increase engine power since it is a replacement manifold rather than a performance header
- Not compatible with 2019+ DT body style so fitment must be confirmed before purchase
Verdict: Choose this kit if you want a rugged, direct-fit manifold engineered to stop common bolt and warping failures on 5.7L HEMI Ram trucks.
Choosing the Right Ram 2500 HEMI Exhaust Manifold: Key Factors to Consider
Fitment and Mounting Accuracy
Correct fitment is the first thing to verify for any exhaust manifold for the Ram 2500 HEMI. Manifolds that match the factory flange geometry, bolt pattern, and header tube orientation reduce the risk of leaks and simplify installation. Poorly fitting manifolds can place stress on studs and gaskets, cause exhaust leaks at the flange, and sometimes contact nearby components leading to vibration noise.
Confirming mounting accuracy also reduces the need for aftermarket modifications or rework of studs and gaskets. For a heavy-duty truck like the Ram 2500, a tight flange and the correct port alignment are essential to maintain torque capacity and to prevent early gasket failure. When possible, choose manifolds that include correct-length studs or come with installation hardware that matches factory specifications.
Material and Thermal Properties
Material choice affects both longevity and heat characteristics. Cast iron manifolds are common for durability and resistance to cracking under normal use, but they can retain more heat and add engine bay temperature. Stainless steel manifolds typically shed heat faster and resist rust, but lower-grade alloys or thin-walled constructions can be prone to cracking if not engineered for the HEMI's thermal cycles.
Consider whether the manifold has a thermal barrier coating or ceramic finish. Coatings help reduce radiated heat to surrounding components and can protect the manifold surface from corrosion. For heavy towing or repeated high-load use common with the Ram 2500, materials and coatings that manage heat and resist thermal fatigue will extend service life and protect adjacent sensors and hoses.
Flange and Gasket Sealing
A leak-free joint between the manifold and cylinder head is critical to prevent exhaust noise, loss of torque, and oxygen sensor errors. Flange flatness and thickness are important because warped or thin flanges will not hold a durable seal. Look for machined faces, reinforced flanges, or thicker cast sections that resist warping.
Gasket compatibility matters too. Many replacement manifolds require a matched gasket design to seal correctly. Some manifolds come packaged with gaskets and studs to ensure the correct compression and alignment. Choosing components that work together reduces the chance of leaks and subsequent exhaust fumes entering the cabin or catalytic converter issues.
Durability and Resistance to Cracking
The HEMI's high cylinder pressures and thermal cycling place stress on manifold materials. Durability is driven by casting or welding quality, joint reinforcement, and design that avoids sharp stress risers. Manifolds with thicker walls at the ports, properly reinforced welds, and gradual transitions from flange to header tubes resist crack initiation.
Maintenance history and operating conditions also affect longevity. Trucks used for towing or sustained high-load operation heat-cycle more frequently. For those use cases, prioritize manifolds designed and tested for repeated thermal cycles and that include features to reduce heat gradients across the part.
Compatibility With Sensors and Exhaust Routing
Your Ram 2500 HEMI uses oxygen sensors and may have EGR or other exhaust-related plumbing that must be retained. Ensure the replacement manifold provides the correct ports in the right locations and that any sensor bung threads match factory specifications. Missing or mislocated sensor ports can trigger check-engine lights and require additional modification.
Also consider the routing of downstream exhaust connections. Some manifolds are direct-fit to the factory downpipe flange and others require adapter flanges or rework. A direct-fit design reduces labor and the chance of alignment issues that create leaks or stress the exhaust system.
Installation Complexity and Serviceability
Installation difficulty varies significantly. Factors such as access to the manifold bolts, whether hardware and gaskets are included, and the need to remove ancillary components will affect labor time. Some manifolds include upgraded studs and nuts that simplify proper torqueing and reduce the risk of rounded fasteners.
Consider future serviceability as well. If the manifold design requires extensive disassembly to access spark plugs, sensors, or other routine service items, that increases ownership cost over time. Choosing a unit that balances ease of installation with robust sealing and durability is important for a heavy-duty truck that will see regular maintenance.
Signs Your Ram 2500 HEMI Manifold Needs Attention
Recognizing early symptoms of manifold failure helps you avoid more costly repairs. Typical signs include a ticking or tapping noise on cold starts that changes with engine load, which often indicates a small leak at the flange or a cracked manifold. You may also notice reduced low-end torque, a louder-than-normal exhaust note, or a persistent exhaust odor in the engine bay.
Other diagnostics include visible soot around flange areas or near welds, which points to escaping exhaust gases. In some cases a leak can cause oxygen sensor readout issues, leading to inconsistent fuel trims and an illuminated check-engine light. Addressing manifold issues promptly keeps towing performance consistent and prevents heat-related damage to surrounding components.
- Tapping or ticking noise at start-up
- Decreased low-end power or engine hesitation
- Soot or carbon buildup around flanges
- Check-engine light with fluctuating O2 sensor values
- Noticeable exhaust smell in the engine bay
Choosing Between Direct-Fit and Performance Manifolds
Direct-fit manifolds aim to replicate factory geometry and mounting to provide a straightforward replacement with minimal modification. They prioritize flange fitment, correct sensor locations, and long-term sealing. For owners who want reliable, maintenance-friendly replacements that preserve factory emissions and drivability, direct-fit units are often the most practical choice.
Performance-oriented manifolds prioritize improved flow and reduced backpressure. Those may use larger internal passages, smoother transitions, or alternative materials that lower exhaust restriction. While they can deliver better high-end power and lower exhaust temperatures, they may require careful selection to ensure they do not introduce fitment or sensor location issues on the Ram 2500 HEMI.
- Direct-fit: simpler install, factory sensor compatibility
- Performance: improved flow, potential heat management benefits
- Verify sensor bungs and flange fit on either type
Thermal Management Strategies
Managing under-hood temperatures is essential on the Ram 2500, especially if you tow or work the truck hard. Thermal barrier coatings, ceramic finishes, and heat shields can reduce the amount of heat radiated from the manifold into the engine bay. Lower radiated heat protects nearby hoses, wiring, and sensors and can improve turbo or catalytic converter life in configurations that include downstream devices.
Another strategy is to use heat wraps or aftermarket shields where appropriate, but be aware that wraps can trap moisture and accelerate corrosion on certain materials. Choosing a manifold with an integrated thermal finish and designed air gaps will often be a better long-term solution for trucks that see heavy duty cycles.
- Thermal coatings reduce radiated heat
- Heat wraps offer short-term reduction but may increase corrosion
- Proper routing and shielding protect sensors and hoses
Preparing for Installation on the Ram 2500 HEMI
Before starting work, gather correct gaskets, hardware, and any replacement studs recommended for the manifold type. Clean the mating surfaces and inspect bolt threads for damage. Torque sequence and values should follow factory specs to avoid flange distortion that causes leaks.
Plan for access challenges. Some bolt locations are tight and may require special swivel sockets or removal of ancillary components. If replacing a manifold due to a cracked section, inspect surrounding fasteners and nearby wiring for heat damage and replace as necessary to avoid repeat labor.
- Use matched gaskets and new fasteners when possible
- Clean and inspect mating surfaces before installation
- Follow factory torque sequence to prevent warping
Maintenance and Long-Term Care
Regular visual inspection of the manifolds and flanges helps catch developing cracks or leaks early. Look for soot streaks, hairline cracks at welds or port transitions, and loose or corroded fasteners. Address minor leaks quickly to avoid heat damage to catalytic converters and nearby components.
If you often tow or haul heavy loads, plan more frequent inspections, as repeated high-temperature cycles increase the likelihood of thermal fatigue. Keeping engine cooling systems in good condition and avoiding prolonged high-idle periods will reduce thermal stress on manifolds.
- Inspect for soot and hairline cracks regularly
- Replace corroded fasteners and damaged gaskets promptly
- Increase inspection frequency when towing frequently
Still looking for the perfect fit?
Select your Ram 2500 configuration to see the most relevant Exhaust Manifolds recommendations
How We Chose the Best Ram 2500 HEMI Exhaust Manifold
We prioritized candidates that offer reliable fitment and proven thermal performance for the Ram 2500 HEMI. Our editorial filters focused on exhaust manifolds that match the vehicle's factory mounting points, flange geometry, and flange thickness to avoid fitment gaps that cause leaks. We also evaluated materials and coatings that reduce heat soak and resist cracking under repeated heating cycles.Key evaluation criteria included heat management, flange and gasket sealing, material durability, manufacturing tolerances, and ease of installation. Heat management covers both the manifold material and any thermal barrier coatings or wraps that limit under-hood temperatures. Flange and gasket sealing assesses how likely a unit is to form a long-term gas-tight seal without warping. Material durability looks at cast iron versus stainless options and their resistance to cracking. Manufacturing tolerances and finish affect both fitment and the likelihood of exhaust leaks. Ease of installation considered bolt access, included hardware, and compatibility with factory sensors and O2 ports.We excluded parts that required cylinder-head modification, nonstandard machining, or significant exhaust system cutting. Units lacking clear fitment data for the Ram 2500 HEMI or with poor flange finish were removed from contention. This process narrowed the field to five options that balance reliability, heat control, and installation practicality.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common exhaust manifold symptoms on a Ram 2500 HEMI?
Common symptoms include a ticking or tapping noise that varies with engine speed, reduced low-end torque, visible soot around flange areas, and an occasional check-engine light due to fluctuating oxygen sensor readings.
Can I replace the exhaust manifold gasket without removing the manifold?
In some cases you can access flange gaskets without a full manifold removal, but on the Ram 2500 HEMI the safest approach is often to remove the manifold to ensure proper surface cleaning and correct torqueing of fasteners. Partial gasket replacement risks improper sealing and future leaks.
How do I diagnose an exhaust manifold leak on this truck?
Diagnosis usually starts with a visual inspection for soot or cracks and listening for a ticking noise on cold start. You can use a smoke test or carefully feel for escaping exhaust gases while the engine is running at idle, but take safety precautions for hot components. Sensor data that shows erratic O2 readings can also point to a leak near the sensor bung.
Will swapping the exhaust manifold affect emissions or performance?
Swapping to a direct-fit replacement should maintain stock emissions and preserve drivability. Swapping to a performance-oriented unit can change backpressure and affect sensor readings, which may alter performance characteristics. Ensure any manifold retains proper sensor locations for consistent emissions control.
What causes exhaust manifolds to crack on the HEMI engine?
Cracking is usually caused by repeated thermal cycling and stress concentrations from thin sections or poor welds. Heavy towing, frequent high-load driving, and rapid cooling cycles increase the likelihood of thermal fatigue that leads to cracks.
How much should I expect to budget for installation-related work?
Installation complexity varies by access and whether studs and gaskets are replaced. Expect jobs that require manifold removal and reinstallation to take several hours. Labor costs depend on shop rates and local conditions, and additional repairs like replacing corroded studs will increase labor time.
Are OEM versus aftermarket manifolds very different for the Ram 2500 HEMI?
OEM units prioritize proven fitment and long-term sealing while some aftermarket options emphasize improved flow or lighter weight. The key differences are often material, flange finish, and thermal coatings rather than drastic geometry changes. Choose based on your priorities for durability, thermal control, and performance.
Final Verdict
When choosing an exhaust manifold for your Ram 2500 HEMI, prioritize correct fitment and a flange that resists warping to minimize leaks. Consider material and thermal finishes based on your typical use, with heavier towing and sustained loads favoring designs that manage heat and resist cracking.Balance ease of installation and sensor compatibility with any performance goals. Prioritize gaskets, hardware, and proper torqueing to ensure a long-lasting seal. With those priorities in mind, you can confidently select a manifold that restores drivability and protects surrounding components.
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- Check out all Ram 2500 parts & accessories
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