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 disclaimer here.
Choosing the right exhaust manifold for your Subaru Outback affects engine efficiency, noise levels, and long-term durability. The wrong manifold can cause leaks, poor scavenging, or premature cracking, while the right one improves exhaust flow and heat control for steadier performance. This guide covers the top shortlisted options for the Subaru Outback and explains the criteria we used to evaluate them, including fitment, material quality, and heat-resistance. Read on to see which manifolds made the list and why they might suit your driving needs.
Looking for other parts? See all Subaru Outback parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Subaru Exhaust Manifold Stud & Nut Kit (6 Studs 6 Nuts) |  |
| Most Popular A crowd favorite that many people choose with confidence | Subaru Genuine Turbo Exhaust Gasket Kit (44022AA150SKT) |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman Exhaust Manifold Kit 674-418 with Gaskets and Hardware |  |
| Best Budget The cheapest option that still gets the job done reliably | CNS Exhaust Manifold Gaskets for Subaru FA20D/EJ20/EJ22T/EJ25 Turbo |  |
| Most Sold A high-volume bestseller chosen again and again | Subaru Genuine Exhaust and Catalytic Converter Gasket Kit (Triangle + 2 Head Pipe Gaskets) |  |
| Best Value for Money The sweet spot between price and what you get | DNJ Exhaust Manifold Gasket Set (EG706) |  |
| Best Overall The best all-around choice for most situations | Fel-Pro MS95088 Exhaust Manifold Gasket Set |  |
1. Subaru Exhaust Manifold Stud & Nut Kit (6 Studs 6 Nuts)
| Manufacturer | Subaru |
|---|---|
| Manufacturer Part Number | 800910550KIT |
| Fits Range | 1990-2018 Subaru models (select applications) |
This Subaru branded stud and nut kit supplies six replacement studs and six nuts intended for exhaust manifold-to-head installations. It is used when old or corroded fasteners are removed during manifold or head work; mechanics typically replace these studs to ensure proper torque and to prevent future leaks or seized threads. The pack contains factory parts matched to Subaru specifications which simplifies reinstalling OEM manifolds and aftermarket headers designed for the factory mounting points. Buyers benefit from the fitment confidence of factory replacement hardware and the convenience of a complete kit sized for common Subaru turbo and non-turbo engines. Limitations are minimal but practical: the kit only includes the studs and nuts so additional hardware, anti-seize, or installation tools are still required, and it is intended specifically for compatible Subaru models rather than as a universal fastener set.
Best for: Reliability-focused owners who prioritize factory-spec repairs and want the assurance of OEM fasteners when replacing an Outback exhaust manifold or reinstalling headers.
Less Ideal for: Buyers looking for a comprehensive hardware kit with gaskets and accessories or those who need fasteners for non-Subaru applications should consider alternative options.
- Genuine Subaru factory replacement parts for correct fit and thread engagement
- Complete set with six studs and six nuts for a full manifold fastener refresh
- Helps prevent seized threads and ensures reliable torque on reinstallation
- Packaged for easy replacement during manifold or head servicing
- Contains only studs and nuts so washers, gaskets, or anti-seize are not included
Verdict A straightforward OEM stud and nut kit that restores factory-fit fasteners for Outback exhaust manifold work, ideal if you want reliable, correct-fit replacements.
2. Subaru Genuine Turbo Exhaust Gasket Kit (44022AA150SKT)
| Manufacturer | SUBARU |
|---|---|
| Brand | Subaru |
| Manufacturer Part Number | 44022aa150skt |
This genuine Subaru gasket kit supplies the factory replacement pieces needed when removing or reinstalling the turbo and exhaust pipes on a turbocharged Subaru Outback. The kit includes the turbo-to-manifold gasket plus up-pipe and down-pipe gaskets and the primary exhaust gaskets in Subaru-sealed packaging, so parts arrive ready to install. For a home mechanic or shop performing turbo service, the main benefit is time saved sourcing individual gaskets and the confidence of using factory-quality parts that match factory mating surfaces. The kit does not include any hardware beyond gaskets, so studs or bolts that are corroded will still need to be replaced separately. Also note this is a parts kit only and does not address installation labor, fitment on non-Outback models, or exhaust flange gaskets that some users reported buying separately. For routine turbo removal, gasket replacement, or leak repair on a Subaru Outback this kit streamlines the job and reduces the risk of mismatched aftermarket pieces.
Best for: Buyers who prioritize convenience and a straightforward repair process and want factory-quality replacement gaskets to quickly complete turbo or exhaust pipe service on their Subaru Outback.
Less Ideal for: Users looking for a complete hardware kit including studs and bolts or those needing exhaust flange gaskets as part of the same purchase should consider a more comprehensive kit or buy supplemental parts.
- Factory-sealed Subaru gaskets so fit and sealing match factory surfaces
- All core turbo and pipe gaskets included to cover turbo, up-pipe and down-pipe connections
- Saves time compared with sourcing individual gaskets from multiple suppliers
- Does not include bolts, studs, or exhaust flange hardware that may need replacement
- Some buyers expect additional exhaust flange gaskets which are not part of this kit
Verdict A convenient factory-sealed gasket kit that streamlines turbo and pipe gasket replacement on the Subaru Outback but does not include hardware or additional flange gaskets.
3. Dorman Exhaust Manifold Kit 674-418 with Gaskets and Hardware
| Manufacturer | Dorman Products |
|---|---|
| Model | 674-418 |
| Includes | Gaskets and downpipe hardware |
| Exterior | Ready To Paint If Needed |
This Dorman exhaust manifold kit is a ready-to-install replacement that bundles the manifold, gaskets, and downpipe hardware so you can complete a single repair without sourcing extra parts. It is cast and designed to match factory fit and function according to the manufacturer, which simplifies installation for technicians replacing a cracked or leaking manifold. Notable features include the included gaskets and hardware and a reverse-engineered design intended to mirror factory mating surfaces. In practice this means faster turnaround and fewer trips to the parts counter when performing an exhaust repair. Some buyers reported excellent fit and material quality, while a few noted the need for minor modifications to sensors or flange edges on certain engines, so careful pre-fit verification is prudent. The part is a practical, performance-minded aftermarket replacement but buyers seeking guaranteed exact fit for a specific Subaru Outback engine should confirm compatibility before ordering because this unit was produced for other vehicle lines and may require adaptation.
Best for: Performance-oriented buyers who want a ready-to-install aftermarket manifold kit that reduces repair time and supplies all needed parts for a single-shop repair.
Less Ideal for: Owners who need a guaranteed, bolt‑in factory-quality manifold for a specific Subaru Outback engine without any modification should consider a factory-quality replacement or a unit explicitly listed for that Outback model.
- Includes all required gaskets and downpipe hardware for a one-order repair
- Cast construction intended to resist warping and provide durability similar to factory manifolds
- Reverse-engineered to match factory mating surfaces for simpler installation
- Not specifically produced for Subaru Outback so fitment may require verification or minor modification
- Some users reported O2 sensor hole and flange alignment needing adjustment on certain engines
Verdict A convenient, performance-minded aftermarket manifold kit that speeds repairs but requires fitment confirmation for Subaru Outback applications.
4. CNS Exhaust Manifold Gaskets for Subaru FA20D/EJ20/EJ22T/EJ25 Turbo
| Compatible engines | FA20D, EJ20, EJ22T, EJ25 Turbo |
|---|---|
| Includes | 2 Exhaust Manifold Gaskets |
| Brand | CNS Engine Parts |
These CNS exhaust manifold gaskets are a budget-friendly factory-replacement style set intended for Subaru 2.0L, 1.8L and 2.5L turbo engines listed (FA20D, EJ20, EJ22T, EJ25). They are used when replacing or resealing the exhaust manifold to stop leaks that cause noise, poor idle, reduced performance, or erroneous oxygen sensor readings. The material is a fiber composite that mirrors OEM thickness and shape, so installation follows the same procedure and requires minimal modification. Practical benefits are straightforward: they restore a tight exhaust seal, reduce exhaust noise, and help the catalytic converter and sensors read correctly after a leak. Several user reports indicate good fitment and longevity when studs and mating surfaces are cleaned before install. Limitations: these are not multi-layer steel gaskets preferred by some for a long-term upgrade, so drivers planning high-mileage, high-boost, or head-gasket work may choose a more durable MLS option instead. Expect a simple, low-cost fix rather than a lifetime solution under extreme conditions.
Best for: Budget-conscious Subaru owners who prioritize an affordable, practical repair to stop exhaust leaks and restore normal engine behavior on Outback-compatible engines.
Less Ideal for: Drivers planning frequent high-boost tuning, long-term high-mileage use, or a complete head-gasket overhaul should consider higher-end MLS manifold gaskets instead.
- Designed to match factory gasket shape for straightforward fitment on listed Subaru engines
- Fiber-composite construction provides a reliable seal for typical driving conditions
- Low-cost option that lets you replace leaking gaskets without major expense
- Multiple reviews report accurate fit and effective sealing after surface prep
- Made from fiber composite rather than multi-layer steel so less ideal for high-boost or high-mileage use
- Sold as a basic replacement set without performance upgrades or enhanced materials
Verdict A dependable, low-cost replacement that restores exhaust sealing on compatible Subaru engines but is not the most durable choice for high-boost or long-term heavy use.
5. Subaru Genuine Exhaust and Catalytic Converter Gasket Kit (Triangle + 2 Head Pipe Gaskets)
| Manufacturer | Subaru |
|---|---|
| Fits engines | EJ253 EJ25i (2.5 SOHC non-turbo) |
| Fitment years | 2005-2012 Legacy/Outback, 2006-2011 Impreza, 2006-2010 Forester |
This genuine Subaru gasket kit replaces the triangle exhaust-to-catalytic-converter gasket and two head pipe gaskets used on older 2.5 SOHC non-turbo Subaru engines. It is intended for routine exhaust repairs when removing or replacing the catalytic converter, manifold, or head pipe, and comes as OEM-sealed parts for straightforward installation. Using factory-quality gaskets reduces the chance of exhaust leaks and preserves proper flange fitment and alignment, which helps maintain emissions performance and prevents exhaust noise. The kit is simple to use for a DIY mechanic or a shop performing exhaust work, since it contains the exact pieces Subaru specifies for the listed model years. The main limitation is fitment: these gaskets apply only to the specified non-turbo EJ25 engines and model years, so they are not a universal repair solution and will not address other exhaust components or hardware that may be corroded or damaged.
Best for: Buyers who prioritize a risk-averse, factory-quality repair approach and want genuine Subaru parts to restore exhaust sealing and emissions performance on covered Outback models.
Less Ideal for: People seeking a universal or multi-year aftermarket gasket solution or those who need a full exhaust hardware kit with bolts and studs included.
- Genuine Subaru factory replacement parts for direct fit and correct flange alignment
- Includes the specific triangle cat gasket plus two head pipe gaskets needed for the repair
- Sealed OEM packaging reduces risk of damaged or mismatched parts on arrival
- Simplifies exhaust repairs by providing the exact gaskets recommended for the engine
- Only compatible with certain 2.5 SOHC non-turbo Subaru models and model years
- Does not include bolts, studs, or other hardware that may be required during installation
Verdict Factory Subaru gaskets that restore proper exhaust sealing for the specified non-turbo 2.5 engines but only fit those exact model years and do not include additional hardware.
6. DNJ Exhaust Manifold Gasket Set (EG706)
| Manufacturer | DNJ ENGINE COMPONENTS |
|---|---|
| Item model number | EG706 |
| Applicable engines | FA20, FA20D, FB25BA, FB20, FB25, EJ257, EJ255, EJ253, EJ251, EJ222, EJ25D, EJ22EZ |
| Condition | New |
This DNJ exhaust manifold gasket set is a straightforward factory-replacement style gasket kit for Subaru H4 engines commonly found in Outback models. It seals the junction between the exhaust manifold and cylinder head to prevent exhaust leaks, reduce noise, and maintain proper backpressure for engine performance. Typical use is during manifold removal, header installation, or when replacing a leaking gasket; the set fits several FA and EJ engine codes used in Subaru vehicles. The product’s practical benefit is that it provides a ready OEM-style replacement without custom modification, which makes installation quicker for a DIYer or a shop. The included DNJ limited warranty offers modest coverage. Limitations are that this is a basic gasket set rather than a premium multi-layer steel or performance-oriented design, so longevity under high-heat or heavily modified exhaust systems may be shorter than higher-end options. Buyers should ensure the listed engine codes match their Outback before purchase.
Best for: Practical optimizers seeking a reliable, budget-friendly factory-style gasket for routine exhaust repairs on a Subaru Outback who prioritize straightforward fit and value.
Less Ideal for: Drivers planning high-performance upgrades, turbo upgrades, or heavy-duty towing who need a high-temperature, multi-layer performance gasket should look for a premium option.
- Made to fit common Subaru H4 engine codes found in Outback models, simplifying replacement.
- Factory-style gasket design that allows direct swap during manifold or header service.
- Sold by a long-standing parts brand with a limited warranty for basic coverage.
- Not a premium multi-layer steel or high-performance gasket suited for heavily modified or high-boost engines.
- Limited warranty only covers replacement of defective parts and is time/mileage capped.
Verdict A cost-conscious, factory-style gasket set that fits many Subaru Outback H4 engines and is a sensible value for routine exhaust repairs.
7. Fel-Pro MS95088 Exhaust Manifold Gasket Set
| Brand | Fel-Pro |
|---|---|
| Model | MS95088 |
| Unit Count | 1.0 Count |
| Exterior | Machined |
This Fel-Pro MS95088 gasket set replaces the exhaust manifold-to-head sealing surfaces to stop leaks and restore proper exhaust routing on compatible Subaru engines. Installers use it when removing or reinstalling manifolds or replacing leaking gaskets that cause noise, check-engine codes, or reduced engine efficiency. The kit is application-specific and validated for fit, form, and function so it contains the gaskets and seals needed to remove and replace the manifold without improvising parts. In practice the machined exterior and reinforced sealing areas resist the high heat near the headers and produce a tight seal when torqued to factory specs. Some buyers reported an imperfect match to an OEM part outline in rare cases, so careful fit verification before installation is sensible. This is a straightforward, professional-grade replacement for routine exhaust repairs but it does not include hardware like studs or bolts that may need replacing on older cars.
Best for: Balanced buyers who want a reliable, factory-quality repair part that minimizes fuss during routine exhaust manifold work and prioritizes fit and durability.
Less Ideal for: People planning a full performance header swap or those who need hardware and studs included should look for a more comprehensive kit tailored to those projects.
- Application-specific design validated for fit, form, and function
- Machined exterior and reinforced sealing areas for durable high-heat performance
- Includes all gaskets and seals required to remove and replace the exhaust manifold
- Meets or exceeds original equipment specifications for sealing
- Does not include manifold studs, bolts, or other fasteners that may need replacement
- A small number of users reported fitment differences versus the factory gasket outline
Verdict A dependable, application‑specific gasket set that restores a factory-quality exhaust seal for routine Subaru manifold repairs.
Choosing the Right Subaru Outback Exhaust Manifold: Key Factors to Consider
Fitment and Bolt Pattern
Correct fitment is critical because the manifold must align with the Outback’s exhaust ports and mounting points. A precise bolt pattern reduces the chance of stressed fasteners and uneven flange contact that can cause exhaust leaks.
When bolt holes and port spacing match the head exactly, installation is simpler and gaskets seat properly. Poor fitment can force installers to modify parts or use excessive sealants, which compromises reliability and increases installation time.
Material and Heat Resistance
The material determines how well the manifold handles thermal cycling and corrosion. Cast iron is common for durability, while stainless steel variants often offer better corrosion resistance and lighter weight. Material thickness and alloy composition affect how quickly the part heats and cools, which relates to cracking risk.
Materials with higher thermal stability can maintain shape and flange flatness over time, reducing the likelihood of warping or leaks. Consider whether the material has been treated with coatings that reflect heat or resist rust to extend service life in a variety of climates.
Flange Quality and Port Matching
Flat, accurately machined flanges are essential for a tight seal against the cylinder head. Poor flange flatness or mismatched ports cause uneven gasket compression, which often leads to exhaust manifold leaks and noisy operation.
Port matching also affects flow efficiency. Smooth transitions and correctly aligned ports reduce turbulence and backpressure, supporting better scavenging and marginal gains in responsiveness. Inspect how a manifold’s ports and flanges are finished when evaluating options.
Thermal Management and Coatings
Effective thermal management keeps underhood temperatures lower and protects nearby components. Ceramic coatings, heat wraps, or thermal paints can reduce radiated heat and help the exhaust gas retain heat for improved flow velocity.
Coatings can also provide a corrosion barrier, but they vary in durability. Consider how a coating is applied and whether it is designed to withstand continuous high temperatures. Good thermal control reduces stress on the manifold and surrounding parts over time.
Durability Against Cracking
Manifolds undergo rapid temperature changes that create expansion and contraction stresses. Design features such as expansion joints, thicker cross-sections at stress points, or reinforced flanges help resist crack initiation and propagation.
Durability is also influenced by welding quality if the manifold is fabricated. Look for consistent weld beads and minimal heat-affected zones. A durable manifold reduces the need for repairs and limits the chance of developing exhaust manifold symptoms like ticking or loss of power.
Installation Accessibility
Ease of installation matters because the Outback’s engine bay can be tight in certain areas. Manifolds designed with service access in mind minimize the need to remove adjacent components and reduce labor time.
Features that aid installation include pre-drilled bolt holes, included mounting hardware or clear instructions, and designs that avoid obstructing spark plug access or heat shields. Consider whether the manifold will require professional tools or specialty procedures to install correctly.
FAQ
What are common exhaust manifold symptoms on a Subaru Outback?
Common symptoms often include a ticking or hissing noise during warm-up, reduced engine responsiveness, and a noticeable exhaust smell in the cabin. These signs usually indicate a leak at the flange or a crack in the manifold. Diagnosing early helps prevent more serious engine or emissions problems.
How do I diagnose an exhaust manifold leak?
Diagnosis usually starts with a visual inspection for soot, cracks, or loose bolts around the flange. While the engine is cold, check fastener torque and gasket condition. A running test can reveal audible leaks that change with engine rpm. For more certainty, a smoke test or professional pressure test can locate hidden leaks.
Can I swap an exhaust manifold myself on a Subaru Outback?
Many owners can perform a swap if they have basic mechanical skills and the right tools, but accessibility and rusted fasteners can complicate the job. Expect to follow torque specs, use new gaskets, and verify clearances. If you lack tools or experience, professional assistance minimizes the risk of leaks or damaged hardware.
When should I replace the exhaust manifold gasket?
Replace the gasket if you detect exhaust noise at the flange, visible soot, or decreased engine efficiency that points to a leak. Gaskets often wear before the manifold itself, and replacing them when you suspect a leak is a cost-effective way to restore a proper seal and avoid further damage.
What causes exhaust manifold cracks?
Cracks commonly result from repeated thermal expansion and contraction, stress concentrations at welds or thin sections, and corrosion that weakens the metal. Driving habits that expose the manifold to frequent high-temperature cycles can increase the risk. Proper material choice and heat management reduce crack likelihood.
How much does installation typically add to exhaust manifold replacement?
Installation time varies based on engine access, corrosion of fasteners, and whether adjacent components must be removed. Jobs with straightforward access often take a few hours, while corroded or hard-to-reach installations can take longer. Expect variability depending on local labor practices and the condition of the vehicle.
How We Chose the Best Subaru Outback Exhaust Manifold
We focused on attributes that matter specifically for Subaru Outback applications and picked products that meet practical, vehicle-focused standards. Key evaluation criteria included: precise engine bay fitment and OEM bolt pattern compatibility to ensure correct alignment; material type and thickness for heat resistance and longevity; flange flatness and port matching for optimal exhaust flow and reduced leak risk; thermal coating or ceramic finishes that help manage underhood temperatures; durability against cracking under repeated thermal cycles; and ease of installation considering access to the Outback engine layout. We excluded items that lacked clear fitment information for Subaru Outback engines, had unverified material claims, or were intended only for racing use without street-legal considerations. The result is a shortlist of manifolds that balance reliable fit, thermal performance, and long-term durability for everyday and spirited driving.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize fitment, material quality, and flange integrity when choosing an exhaust manifold for a Subaru Outback. Those factors most directly affect leak resistance, thermal durability, and long-term reliability. Balance thermal management and ease of installation against durability needs for your driving style. Addressing signs like ticking or poor flow promptly will limit collateral damage and help maintain engine performance.
Explore More:
- Check out all Subaru Outback parts & accessories
- Explore Exhaust & Emissions
- Browse all Auto Parts
