Nissan Altima 2.5L Exhaust Manifold Catalytic Converter
$152.99 price checked August 2026
If you need a direct replacement for a 2007-2012 Nissan Altima 2.5L engine, this is the right choice.
Where the Altima Exhaust Manifold Fits
The Nissan Altima 2.5L Exhaust Manifold Catalytic Converter is for owners of 2007-2012 Nissan Altima L4 2.5L engines who need an exact-fit replacement that matches OE Part Number 14002-JA91E.
Restoring your vehicle to its original exhaust flow ensures the engine runs efficiently and meets standard emissions requirements. A high-quality converter assembly maintains the integrity of the exhaust path while keeping the engine’s power delivery smooth.
The Nissan Altima 2.5L Exhaust Manifold Catalytic Converter achieves this by replacing the factory-installed manifold with a leak-resistant unit. It is designed specifically for the 2.5L L4 engine, ensuring the manifold bolts to the head and the exhaust tubes align with the cylinder ports.
Our comparison of the exhaust manifold converter options we evaluated focused on identifying units with precise interchange compatibility. This review is for the buyer who needs a direct replacement for the 14002-JA91E part number.
If you are shopping for a different vehicle, view top-rated Hyundai Santa Fe Sport manifold converters.
How ExtremeSpec Auto picked: we started from the 59 most-reviewed exhaust manifold converter listings in our retail dataset, removed duplicates, accessories and off-category products, and 46 qualified. This product is one of 10 from that pool chosen for a full review. Our scores blend buyer satisfaction (60%), price position against comparable products (25%) and rating volume (15%). Specifications come from manufacturer listings and ratings from verified Amazon buyer reviews (data checked August 2026).
The Short Answer on the Altima Exhaust Manifold
Best for: you need a direct replacement for a 2007-2012 Nissan Altima L4 2.5L engine that matches the original factory geometry.
The Nissan Altima Exhaust Manifold is the recommended choice at $152.99.
- Pro: It matches the OE Part Number 14002-JA91E for an exact-fit replacement.
- Pro: The leak-resistant design ensures the manifold maintains a secure seal during operation.
- Pro: It holds a 4.2 rating from 106 buyer ratings to confirm fitment reliability.
- Con: It is not CARB approved, which prevents use on California emissions-equipped vehicles.
- Con: The product cannot be shipped to California, restricting purchase options for residents of that state.
Don’t buy this if: your vehicle is equipped with California emissions systems or if you are located in the state of California.
Price assessment: The $152.99 price is a fair market value for an exact-fit manifold and converter assembly.
ExtremeSpec Auto score: 7.9/10 (data-driven – see “How we picked” above)
The Specifications That Matter
| Compatible Vehicles | 2007-2012 Nissan Altima L4 2.5L Engine |
| Manufacturer Part Number | 14002-JA91E, 674-933, 12498616 |
| Interchange Part Number | 327-50268, 327-50639, 140E2ZX31E, 140E2JA02E |
| Fitment Type | Direct replacement, exact-fit kit |
| Seal Type | Leak-resistant |
| CARB Approval | Not CARB approved |
The Altima Exhaust Manifold is a direct replacement kit designed to match the geometry of the factory installed exhaust manifold.
Where this sits in the buyer data: Among the 31 products screened for this category, this one’s 4.2 rating places it #15, on 106 ratings – above the 6-rating median of that group, so the average rests on more feedback than most of its comparables. On price it undercuts 27 of them.
Before You Buy: Altima Exhaust Manifold Checklist
The first thing to check is your vehicle’s specific engine configuration to ensure the manifold geometry aligns with your engine block casting.
- ☐ Confirm your vehicle is a 2007-2012 Nissan Altima with a 2.5L L4 engine
- ☐ Verify your OE part number matches 14002-JA91E
- ☐ Check that your vehicle is not equipped with California emissions systems
- ☐ Confirm your location is outside of the state of California
- ☐ Verify the kit includes the hardware required for a direct replacement of the factory installed exhaust manifold
You should not buy this product if your vehicle is a California emissions equipped model or if you are located in California, as this unit is not CARB approved.
Performance: What the Specs Deliver
Exact Replacement Fitment
The Nissan Altima 2.5L Exhaust Manifold Catalytic Converter is designed as a direct replacement kit that replaces the factory installed exhaust manifold. Because this unit matches the OE Part Number 14002-JA91E, you can expect the manifold geometry to align with your specific engine block casting. This ensures the exhaust tubes align with the cylinder ports, avoiding a port mismatch where the manifold bolts to the head but the tubes do not line up.
The Altima Exhaust Manifold supports the restoration of your vehicle’s original performance by maintaining the correct exhaust flow path for the 2.5L L4 engine. While the data does not specify a power increase over the OEM cast iron manifold, the exact-fit design ensures the vehicle returns to its intended operating state. You should confirm your engine block casting matches the 14002-JA91E specification before ordering to ensure the manifold geometry is correct for your specific year and model.
Leak-Resistant Construction
Leak-resistant construction on the Altima Exhaust Manifold ensures that exhaust gases remain contained within the system. This prevents the common failure mode of exhaust leaks that can cause noise and pressure loss. By conforming to product standards, the manifold maintains the integrity of the connection between the engine head and the rest of the exhaust system.
The Altima Exhaust Manifold provides a sealed connection to help your car run as intended by the manufacturer. Because this unit is not CARB approved, it cannot be shipped to or installed on a California emissions-equipped vehicle. For all other regions, the leak-resistant design supports the durability of the exhaust system, ensuring the converter does not overheat due to improper gas flow.
How the Altima Exhaust Manifold Compares to Alternatives
The Nissan Altima Exhaust Manifold Catalytic Converter provides a direct replacement for factory units with a specific focus on OE part number 14002-JA91E compatibility.
- The Nissan Altima Exhaust Manifold Catalytic Converter costs $152.99, which is $1 more than the Nissan Altima Front Manifold Catalytic Converter.
- The Nissan Altima Exhaust Manifold Catalytic Converter holds a 4.2 rating from 106 buyer ratings, outperforming the 1.0 rating of the Nissan Altima Exhaust Manifold Catalytic Converter.
- The AutoShack EM775001 Front Exhaust Manifold Catalytic Converter costs $156.35, making it $3.36 more expensive than this unit.
- The 53189 679-550 679-551 Manifold Catalytic Converter costs $151, meaning this unit costs $1.99 more than that option.
- The Dodge Caliber Jeep Compass Jeep Patriot Manifold Catalytic Converter costs $151.99, which is $1 less than the Nissan Altima Exhaust Manifold Catalytic Converter.
You should choose the AutoShack EM775001 Front Exhaust Manifold Catalytic Converter if you require an EPA OBDII Approved component with ISO / IATF 16949 Certification.
The data provided does not specify a service life or material thickness for the Nissan Altima Exhaust Manifold Catalytic Converter. You must verify the substrate material and coating specifications with the manufacturer to determine the expected durability against rust or cracking.
Owners of a different sedan can view our comparison of Toyota Camry manifold converters.
For a deeper dive into the mechanics, see how an exhaust manifold converter functions.
The Altima Exhaust Manifold: Remaining Questions
Frequently Asked Questions
Will the Nissan Altima 2.5L Exhaust Manifold Catalytic Converter fit my 2010 vehicle?
Yes, the Altima Exhaust Manifold is designed as a direct replacement for 2007-2012 Nissan Altima L4 2.5L engines. It uses the 14002-JA91E OE part number to ensure the manifold geometry aligns with your specific engine block casting.
Why is the price of this Altima Exhaust Manifold so much lower than a dealership part?
The $152.99 price point reflects an aftermarket production model rather than an original equipment manufacturer (OEM) retail markup. While it matches the 14002-JA91E specifications, it is manufactured as a high-flow alternative to the factory-installed unit.
Will this part cause me to fail an emissions test?
Not in most regions, but this unit is not CARB approved and cannot be shipped to or installed on a California emissions-equipped vehicle. You must confirm your local state requirements, as the lack of California Air Research Board certification limits its legal use in certain states.
Is this a complete kit for the exhaust system?
The Altima Exhaust Manifold is a direct replacement kit that replaces the factory installed exhaust manifold. It includes the manifold and converter assembly, but you should verify if your specific vehicle requires additional gaskets or hardware not included in the 14002-JA91E kit.
Is the Altima Exhaust Manifold Right for You?
The Altima Exhaust Manifold suits 4 kinds of buyer and is the wrong choice for 3 jobs, listed below with the reason for each.
Who the Altima Exhaust Manifold is for, and what it does well
Who the Altima Exhaust Manifold suits
- Independent auto mechanics — the direct replacement and exact-fit kit allows for a quick swap during a standard repair
- Budget-conscious commuters — the $152.99 price point provides an affordable way to fix a failing exhaust system
- DIY car owners in non-California states — the leak-resistant design allows for a reliable home repair on a 2007-2012 Altima
- Fleet maintenance technicians — the specific OE part number 14002-JA91E ensures compatibility for high-volume vehicle upkeep
What the Altima Exhaust Manifold handles well
- Replacing a cracked factory manifold — the direct replacement, exact-fit kit replaces factory installed exhaust manifold
- Fixing exhaust leaks — the leak-resistant design ensures a sealed connection
- Restoring engine performance on a 2007-2012 Altima — the 2.5L engine compatibility ensures correct fitment
- Standardizing parts inventory — the multiple manufacturer and interchange part numbers ensure cross-reference accuracy
What the Altima Exhaust Manifold is the wrong choice for
- Registering a vehicle in California — the product is not CARB approved and cannot be shipped to the state of California
- Repairing a California emissions equipped vehicle in New York — the product cannot be installed on California emissions equipped vehicles in the state of New York
- High-performance racing modifications — the product is a direct replacement for factory parts rather than a performance upgrade
What to budget alongside the Altima Exhaust Manifold, and what to skip
Worth buying at the same time
- Exhaust manifold gaskets — necessary to ensure the leak-resistant seal with the engine block
- Socket wrench set — required to install the manifold onto the 2.5L engine
- Anti-seize lubricant — needed for the bolts to ensure easy removal during future maintenance
- Penetrating oil — required to loosen rusted factory bolts on a 2007-2012 vehicle
- Torque wrench — required to secure the manifold to factory specifications
What you can skip
- Additional mounting brackets — the exact-fit kit replaces the factory installed exhaust manifold and includes necessary mounting points
- Alternative manifold styles — the direct replacement spec means no other manifold shape is needed for this specific application
Where to Buy the Altima Exhaust Manifold
These retailers sell Exhaust Manifold Converter generally – we do not track which of them has this particular model in stock, so check availability and the current price with the retailer before making a trip.
- RockAuto (online only) — extensive catalog breadth and competitive pricing
- Summit Racing Equipment (online only) — specialist performance and aftermarket options
- Amazon (online only) — wide variety of third-party brands
- eBay (online only) — finding specific OE replacements and used parts
- AutoZone (online and physical stores) — local availability and in-store returns
- O’Reilly Auto Parts (online and physical stores) — local availability and in-store returns
- Advance Auto Parts (online and physical stores) — local availability and in-store returns
Final Verdict on the Altima Exhaust Manifold
If you need a direct replacement for a 2007-2012 Nissan Altima L4 2.5L engine, the Nissan Altima Exhaust Manifold is the correct choice at around $152.99. This kit replaces the factory installed exhaust manifold and provides a leak-resistant fit for that specific engine block.
The Altima Exhaust Manifold provides an exact-fit kit that matches the OE Part Number 14002-JA91E. It also maintains a 4.2 rating from 106 buyer ratings, confirming its reliability as a replacement for the factory unit.
Skip it if: you own a California emissions equipped vehicle or need a CARB-approved converter, as this unit cannot be shipped to or installed in California.
The rest of our Exhaust Manifold Converter guides
- Exhaust Manifold Catalytic Converters for Toyota Camry Compared
- Choosing the Best Exhaust Manifold Catalytic Converter for Nissan Altima
- The Exhaust Manifold Catalytic Converters That Work Best for Honda Civic
- Which Exhaust Manifold Catalytic Converter is Best for a Jeep Wrangler?
- Best Exhaust Manifold Catalytic Converters for Hyundai Santa Fe Sport