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If your Nissan Pathfinder is showing rough idle, increased cabin noise, or reduced performance, the exhaust manifold can be a common culprit. Choosing the right exhaust manifold matters because fit, heat tolerance, and sealing directly affect engine performance, emissions, and long-term durability. This guide covers the top shortlisted exhaust manifolds for the Nissan Pathfinder, chosen for their fitment reliability, material quality, and sealing solutions. Below you will find our top picks and the evaluation criteria we used to assess each option.
Looking for other parts? See all Nissan Pathfinder parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | A-Premium Left Side Engine Exhaust Manifold Kit with Gaskets & Hardware |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman 674-331 Passenger Side Exhaust Manifold with Gaskets and Hardware |  |
| Best Budget The cheapest option that still gets the job done reliably | Dorman 674-589 Exhaust Manifold Kit with Gaskets and Hardware |  |
| Most Sold A high-volume bestseller chosen again and again | UNITHUB Front Catalytic Converter Compatible with Nissan Altima 2.5L (Direct Replacement) |  |
| Best Value for Money The sweet spot between price and what you get | Dorman 674-905 Passenger Side Exhaust Manifold Kit (includes gaskets and hardware) |  |
| Best Overall The best all-around choice for most situations | A-Premium Front Exhaust Manifold Catalytic Converter with Gasket Kit |  |
1. A-Premium Left Side Engine Exhaust Manifold Kit with Gaskets & Hardware
| Brand | A-Premium |
|---|---|
| Material | Cast Iron |
| Fitment Type | Direct Replacement |
| Includes | Manifold, manifold gasket, flange gasket, nuts, mounting hardware |
This left-side exhaust manifold kit replaces a cracked or leaking factory manifold on the VG33E 3.3L engine and comes with the manifold, manifold and flange gaskets, nuts, and mounting hardware. It is cast iron construction with a heat shield and is intended as a direct replacement to restore a proper exhaust seal and reduce common manifold ticking or exhaust leaks. Installation typically involves removing the old warped or cracked manifold and bolting this unit in using the supplied gaskets and hardware; reviewers report ports and bolt holes line up without modification. The practical benefits are improved sealing, heat resistance from cast iron, and a complete kit that avoids hunting for parts. Limitations to consider are the usual tight access for removal on the VG33E head and that studs or bolts previously damaged during removal may require replacement separately. This is a straightforward, reliability-minded replacement for keeping an older Nissan 3.3L engine running as intended.
Best for: A reliability-focused buyer who wants a factory-quality replacement to fix exhaust leaks and restore normal engine operation on older Nissan 3.3L vehicles.
Less Ideal for: Buyers looking for performance gains, aftermarket tuning, or a lightweight performance manifold should look at specialty performance options instead.
- Includes manifold gasket, flange gasket, nuts, and mounting hardware for a one-stop replacement.
- Cast iron construction offers high temperature resistance and sturdy structure expected for long-term use.
- Heat shield included to help manage under-hood temperatures and protect nearby components.
- Direct-replacement fit for the VG33E 3.3L application reported to align without modification.
- Does not include replacement studs or bolts that may be seized or broken during removal.
- Fitment and installation can be constrained by tight access to the left-side exhaust ports on the engine.
- Manufacturer guarantee mentioned in listing but warranty details are not provided in the product specs.
Verdict A complete, cast-iron left-side replacement manifold kit aimed at reliably stopping leaks and restoring stock exhaust function on the Nissan 3.3L VG33E engine.
2. Dorman 674-331 Passenger Side Exhaust Manifold with Gaskets and Hardware
| Manufacturer | Dorman Products |
|---|---|
| Model | Dorman 674331 Exhaust Manifold |
| Manufacturer Part Number | 674-331 |
| OEM Part Number | 101554; 14002-JA10A |
This Dorman passenger-side exhaust manifold is a complete replacement meant to restore exhaust routing and seal on compatible vehicles without sourcing extra parts. It arrives with the necessary gaskets and downpipe hardware so the typical installation is a single-job repair rather than multiple parts orders. Dorman says the casting is reverse-engineered from factory units and finished with machined mating surfaces to help alignment and sealing. For a performance-oriented buyer the main benefit is dependable fit and reduction of installation time when replacing a cracked or leaking manifold that can cause exhaust leaks and check-engine codes. Be aware that a few users report uneven weld or finish quality on the flange area, so inspection and minor cleanup may be needed before installation to ensure optimal flow and sealing. This part focuses on straightforward replacement rather than performance gains, so it is best used to restore factory performance and reliability rather than increase power.
Best for: Performance-oriented buyers focused on restoring reliable exhaust flow and eliminating leaks quickly with a single replacement part and minimal downtime.
Less Ideal for: Those seeking a tuned or high-flow performance manifold for increased power or aftermarket tuning should look for dedicated performance units instead.
- Includes all required gaskets and downpipe hardware for a one-order repair
- Machined mating surfaces intended to match factory fit and simplify installation
- Reverse-engineered design aimed at factory-compatible alignment and sealing
- Not marketed as a performance-enhancing manifold; designed to restore factory performance
- Some reports of inconsistent weld or flange finish that may require minor cleanup before installation
Verdict A practical, ready-to-install passenger-side replacement that restores factory exhaust function and cuts installation hassle for Nissan Pathfinder owners seeking reliable repairs.
3. Dorman 674-589 Exhaust Manifold Kit with Gaskets and Hardware
| Brand | Dorman |
|---|---|
| Model | 674-589 |
| Position | Center |
| Bolt Pattern (Number of Holes) | 8 |
This Dorman exhaust manifold kit is a budget-oriented replacement designed to restore the exhaust flow and sealing on compatible Nissan models. It is supplied as a complete repair package with all required gaskets and downpipe hardware so you can replace a cracked or leaking manifold without sourcing extra parts. Dorman states the part is reverse-engineered to reproduce factory fit and the painted finish helps resist surface corrosion. Typical use is a direct replacement during a mid-level repair where the original manifold is warped, cracked, or leaking and you want a one-order solution. Practical benefits include fewer trips for missing hardware and a generally straightforward installation when bolt patterns align. Limitations to expect are occasional fitment variances reported by owners, such as mismatched heat shield or bolt hole alignment, and a small number of reports of flange cracking, so careful inspection at installation and replacing exhaust manifold bolts if corroded is advised.
Best for: Budget-conscious owners who want a low-cost, ready-to-install replacement manifold to get a Nissan Pathfinder back on the road without ordering multiple parts.
Less Ideal for: Drivers seeking a premium or performance manifold or those unwilling to check and possibly adapt mounting points should consider higher-end or vehicle-specific options.
- Complete kit includes gaskets and downpipe hardware for a single-order repair
- Reverse-engineered design intended to match factory fit and function
- Painted finish for basic corrosion resistance
- Covers specified Nissan model years listed for straightforward replacement
- Some users report fitment issues with heat shield or bolt hole alignment
- A few reports of flange damage or cracking on delivery or during installation
Verdict A wallet-friendly, all-in-one replacement that simplifies a Pathfinder manifold repair but may require careful fit checks during installation.
4. UNITHUB Front Catalytic Converter Compatible with Nissan Altima 2.5L (Direct Replacement)
| Position | Front |
|---|---|
| Manufacturer | UNITHUB |
| OEM Part Number | 674-933 |
| Model | Catalytic Converter |
This UNITHUB front catalytic converter is a direct-replacement unit intended to restore emissions control and quiet engine operation on compatible Nissan Altima 2.5L models. It installs where the factory front converter sits and is typically used to clear P0420/P0430 codes, reduce exhaust noise, and return the vehicle to compliant emissions performance. The housing uses 409 stainless steel and welded joints to resist corrosion and high exhaust temperatures, while a dual-layer ceramic carrier and precious-metal coating increase surface area for conversion efficiency. The unit ships with the shown accessories but requires professional installation for correct fit and sensor alignment. Important limitations are that this is not CARB-compliant, so it is not legal for use in California or other states that require CARB certification, and fitment is limited to the listed Altima years and engine. Buyers should verify OEM part numbers match their vehicle before purchasing.
Best for: A risk-averse mainstream buyer seeking a straightforward, factory-style replacement to restore emissions performance and eliminate related check-engine codes on their Nissan Altima 2.5L without experimental modifications.
Less Ideal for: Drivers in states that require CARB-compliant parts or owners who want a high-performance or custom exhaust solution should look elsewhere.
- Direct-fit design intended to match factory mounting and resolve P0420/P0430 codes
- 409 stainless steel housing and welded connections for corrosion and heat resistance
- Dual-layer ceramic carrier with precious-metal coating to improve conversion efficiency
- Includes installation accessories shown in product images
- Not CARB-compliant so not legal for emissions-controlled states
- Compatibility limited to the specific Nissan Altima 2.5L years listed, requires confirming OEM part numbers
Verdict A practical, factory-style front catalytic converter replacement for Altima 2.5L owners who need to restore emissions function, but it is not legal for CARB-required states.
5. Dorman 674-905 Passenger Side Exhaust Manifold Kit (includes gaskets and hardware)
| Installation Type | Bolt-On |
|---|---|
| Automotive Fit Type | Universal Fit |
| Manufacturer | Dorman Products |
| Exterior | Machined |
This Dorman passenger-side exhaust manifold kit is a direct replacement designed to restore exhaust routing and stop common leaks. It is supplied with gaskets and downpipe bolts so you can complete the manifold-to-downpipe connection without sourcing extra parts. In typical use it replaces a warped or cracked factory manifold and cures ticking noises and exhaust leaks that affect engine performance and idle. The company says the part is precision-engineered from factory patterns and machined for a sealed flange surface, which helps reduce post-install leaks. Several owners report straightforward fits after minor bolt or alignment tweaks, while others note the manifold-to-head bolts are not included so you may need to purchase those separately. The machined exterior and included downpipe hardware speed repairs, but some buyers found small fitment or clearance trimming was necessary on certain vehicles. For a budget-conscious repair this kit bundles most items needed and offers noticeably better sealing than many aging OEM units, though professional installation is recommended for tight engine bays.
Best for: Practical optimizer focused on repairing a Nissan Pathfinder economically and quickly while minimizing repeat repairs; ideal for someone who prefers a bundled, ready-to-install replacement over sourcing parts separately.
Less Ideal for: Not the best choice for buyers seeking a guaranteed bolt-in, no-modification OEM fit without checking part-side and hardware details first or for those who want a custom performance header.
- Includes gaskets and downpipe hardware for a near-complete repair
- Machined flange surfaces to improve sealing and reduce leaks
- Designed as a factory-pattern replacement to simplify installation
- Durable construction intended to resist warping and cracking
- Manifold-to-head bolts are not supplied so additional fasteners may be required
- Some users reported minor fitment or clearance adjustments during installation
Verdict A cost-effective, mostly complete passenger-side manifold kit that restores sealing and stops exhaust leaks, but confirm required head bolts and fitment before installing on your Nissan Pathfinder.
6. A-Premium Front Exhaust Manifold Catalytic Converter with Gasket Kit
| Vehicle fitment | Nissan Altima 2007–2013 L4 2.5L |
|---|---|
| Position | Front |
| Body material | Stainless Steel |
| Inlet type | 5 Bolt Welded |
| Gasket & bolts included | Yes |
This A-Premium front exhaust manifold with an integrated catalytic converter replaces the factory front unit and arrives with gaskets and mounting hardware to simplify installation. It is built from stainless steel with welded 5-bolt inlet and 3-bolt outlet flanges and is intended for direct-fit replacement on compatible Nissan 2.5L engines. The included gasket and bolts mean most installations require minimal parts purchasing beyond basic hand tools and possibly a lift or jack stands. Customers report generally good fit and heat shield alignment, and the EPA-compliant core makes it suitable for federal-emissions vehicles outside restricted states. Expect straightforward restoration of emission control function and the ability to pass inspections where allowed. Be aware that some buyers reported shipping dents and a small number experienced premature internal failure, so careful inspection on arrival and verifying warranty activation are advisable before installation.
Best for: A balanced all-round buyer who wants a cost-effective, direct-replacement manifold that closely mirrors factory fit and restores emissions functionality without extensive modification.
Less Ideal for: Buyers in states with stricter aftermarket emissions rules or those who need a long-term OEM-backed part for high-mileage durability should consider alternative factory-quality options.
- Direct-fit replacement designed to match factory mounting points and heat shields for the specified Nissan application
- Includes gaskets and mounting bolts so you do not need to source additional hardware
- Stainless steel construction resists corrosion better than mild steel alternatives
- EPA-compliant for federal emissions applications where allowed by state law
- Not legal for sale or use in California, Colorado, New York, and Maine due to state emissions regulations
- Some units have arrived with shipping dents and at least one buyer reported internal failure after months of use
Verdict A practical, direct-fit replacement that restores emissions function for the specified Nissan 2.5L application but check state legality and inspect on arrival.
Choosing the Right Nissan Pathfinder Exhaust Manifold: Key Factors to Consider
Vehicle-Specific Fitment
Accurate fitment to the Nissan Pathfinder makes installation simpler and reduces the chance of leaks. Manifolds that match factory flange locations and mounting points prevent stress on bolts and studs and avoid the need for adapter plates or modification.
Poor fitment can lead to misaligned ports, which impedes exhaust flow and can cause premature gasket failure. Always check flange dimensions and bolt pattern compatibility to ensure a snug, leak-free connection.
Material and Heat Resistance
Exhaust manifolds see extreme temperatures that can cause warping, cracking, or accelerated corrosion. Materials like cast iron and high-grade stainless steel manage heat differently; cast iron resists thermal shock while stainless steels offer corrosion resistance with lighter weight.
Consider how the material handles repeated heating and cooling cycles, and whether coatings or ceramic finishes are applied to reduce radiant heat transfer to nearby components. Long-term durability often depends on the material choice and the manufacturing quality.
Sealing Method and Gasket Quality
A reliable seal between the manifold and cylinder head is essential to prevent leaks that cause noise, poor performance, and potential engine damage. Gasket type, thickness, and compressibility influence the seal's ability to conform to flange imperfections.
Some manifolds include integrated flange finishes or multi-layer steel gaskets that maintain sealing under high temperatures. Evaluate whether the manifold comes with a compatible gasket or requires a separate purchase, and prefer solutions that reduce the chances of leaks after installation.
Flange Flatness and Port Alignment
Flange flatness and correct port alignment directly affect exhaust flow and the risk of leaks. Warped or uneven flanges can concentrate stress on gaskets and fasteners, while mismatched ports create turbulence and backpressure.
Inspecting flange machining and port match to the cylinder head ensures smoother flow and better longevity. High-quality machining and consistent tolerances reduce installation headaches and the likelihood of post-install leaks.
Durability and Resistance to Cracking
Cracks in the manifold lead to exhaust leaks, noise, and sometimes hazardous fumes entering the cabin. Durability depends on material choice, wall thickness, and how the part dissipates heat.
Look for manifolds designed to withstand thermal cycling and mechanical stress. Reinforced areas around bolt holes and robust casting or welding practices can reduce the risk of cracking over the life of the vehicle.
Ease of Installation and Serviceability
Manifolds that align with factory hardware and allow access to mounting bolts save time and reduce the need for special tools. Features like heat shields, service-friendly bolt access, and compatibility with original exhaust hardware make replacement less invasive.
Consider whether the manifold requires removal of other components, special fasteners, or re-torquing procedures. Easier installation lowers labor complexity and the chance of installation-related leaks.
FAQ
What are common exhaust manifold symptoms on a Nissan Pathfinder?
Common symptoms often include a ticking or tapping sound that changes with engine speed, reduced engine torque, and sometimes fumes near the engine bay. You may also notice decreased fuel efficiency or a rough idle. These signs usually indicate a leak or cracking that should be inspected promptly.
How can you diagnose an exhaust manifold leak?
Diagnosis often starts with a visual inspection for cracks or soot near the flanges. A listening test while the engine is running can localize a ticking noise, and feeling for escaping air (carefully, when cool) can help pinpoint a leak. Professional diagnostics may include smoke tests or pressure checks for a more definitive assessment.
Should I replace the gasket when swapping an exhaust manifold?
It is usually advisable to replace the exhaust manifold gasket whenever you remove or swap the manifold. Gaskets compress and conform to flange surfaces, and reusing an old gasket can increase the risk of leaks. Using a properly matched gasket helps ensure a reliable seal after installation.
What causes an exhaust manifold to crack?
Cracking typically results from repeated thermal cycling, uneven heating, or stress concentrations at bolt holes and mounting points. Corrosion and impact damage can also contribute. Choosing a manifold designed for thermal resilience and ensuring proper installation torque can reduce the likelihood of cracking.
How much does it typically cost to install an exhaust manifold?
Installation cost usually depends on labor rates and how accessible the manifold is on the vehicle. Jobs that require removal of nearby components or replacement of studs and hardware take longer and cost more. Asking for an estimated labor time based on your vehicle model gives a clearer expectation of installation cost.
How We Chose the Best Nissan Pathfinder Exhaust Manifold
We focused on factors that matter most for Nissan Pathfinder exhaust manifolds: precise vehicle-specific fitment, material and thermal resistance, flange and port alignment, gasket and sealing quality, and long-term durability under repeated heat cycles. We prioritized manifolds that use materials and construction methods appropriate for constant high-temperature exposure and that minimize distortion at flange faces. Ease of installation and compatibility with factory mounting points were also important, since poor alignment can cause leaks and stress on fasteners. Excluded items included universal-fit headers and manifolds that required extensive modification or adapter plates, as these introduce fitment risk and additional sealing challenges. We also excluded components that lacked clear information on port dimensions or flange flatness. The resulting shortlist reflects products that meet our practical criteria for fit, heat management, sealing, and long-term serviceability for the Nissan Pathfinder.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing an exhaust manifold for a Nissan Pathfinder, prioritize precise fitment, robust materials that handle heat cycles, and a reliable gasket or sealing method. Those factors most strongly influence noise levels, engine performance, and long-term durability. Balance ease of installation and the risk of future leaks when making your decision. Focusing on flange flatness, port alignment, and construction quality will help you select an option that performs well and lasts.
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