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If you drive a Subaru Impreza, the exhaust manifold plays a key role in engine performance, emissions, and thermal management. Choosing the right manifold matters because poor fit, inadequate heat resistance, or a leaking flange can lead to drivability issues and costly follow-up work. This guide covers seven shortlisted exhaust manifolds selected for their suitability to the Impreza, focusing on fitment, material, and heat-handling characteristics. Below you will find clear criteria and guidance to help you decide which option suits your needs, plus practical considerations for installation and longevity.
Looking for other parts? See all Subaru Impreza parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Subaru Exhaust Manifold Stud & Nut Kit (Stud 800910550 x6, Nut 902370029 x6) |  |
| Most Popular A crowd favorite that many people choose with confidence | CNS Exhaust Manifold Gaskets for Subaru FA20D/EJ20/EJ22T/EJ25 Turbo |  |
| Best Quality Built to a higher standard if you want something more solid | BRGMAX Exhaust Manifold Gasket Kit for Subaru WRX/STI (Single-Turbo EJ Engines) |  |
| Best Budget The cheapest option that still gets the job done reliably | Hugwits 2-Pack 60mm Graphite Exhaust Manifold Donut Gasket (2.36" ID) |  |
| Most Sold A high-volume bestseller chosen again and again | Subaru Genuine Exhaust Manifold and Catalytic Converter Gasket Set |  |
| Best Value for Money The sweet spot between price and what you get | Fel-Pro MS95088 Exhaust Manifold Gasket Set |  |
| Best Overall The best all-around choice for most situations | Dorman Exhaust Manifold Hardware Kit (03413B) |  |
1. Subaru Exhaust Manifold Stud & Nut Kit (Stud 800910550 x6, Nut 902370029 x6)
| Manufacturer | Subaru |
|---|---|
| Manufacturer Part Number | 800910550KIT |
| Fits | Subaru models 1990-2019 (listed applications) |
This genuine Subaru stud and nut kit supplies six studs and six corresponding nuts intended for replacing exhaust manifold fasteners on supported Subaru models. It is typically used during manifold or head repairs and rebuilds to replace corroded or damaged hardware with factory-quality parts. Notable features include OEM fitment, sealed packaging, and fasteners matched to Subaru part numbers for straightforward installation. In practice the studs thread cleanly and the nuts seat properly, which reduces the risk of leaks and makes torqueing predictable compared with unknown aftermarket fasteners. The kit is limited to the specific stud and nut counts, so larger repairs may require multiple kits, and it only replaces fasteners rather than gaskets or other manifold components. For reliability-focused owners who prefer factory-quality replacements, this kit simplifies repairs and restores factory clamping where it matters most.
Best for: Reliability-focused Subaru owners who prioritize factory-quality replacements and want peace of mind when doing exhaust manifold or head work on their Impreza.
Less Ideal for: Buyers needing a complete manifold repair kit including gaskets or other hardware should look for more comprehensive rebuild sets rather than this fastener-only kit.
- Factory-quality Subaru parts for direct fit and compatibility
- Includes both studs and matching nuts to replace worn fasteners
- Sealed OEM packaging ensures correct parts and thread condition
- Threads and fitment reported to be precise, which eases installation
- Kit only contains six studs and six nuts so multiple kits may be needed for larger jobs
Verdict A small OEM fastener kit that restores factory clamping for exhaust manifolds, ideal for owners who want reliable, genuine Subaru replacement studs and nuts.
2. CNS Exhaust Manifold Gaskets for Subaru FA20D/EJ20/EJ22T/EJ25 Turbo
| Compatible engines | FA20D, EJ20, EJ22T, EJ25 Turbo |
|---|---|
| Includes | 2 exhaust manifold gaskets |
| Manufacturer | CNS Engine Parts |
| Manufacturer part number | EM205 |
These CNS exhaust manifold gaskets are a straightforward replacement for Subaru turbo applications that use the FA20D or EJ-series engines. They install between the exhaust manifold and cylinder head to stop leaks that cause noise, reduced power, and incorrect oxygen sensor readings. The set comes as two gaskets sized for the factory flange pattern and is made from a fiber-composite style that matches the shape and thickness of many factory parts. In practical use they provide a reliable seal after proper surface prep and stud cleaning, and multiple owner reports show fitment that is equal to or slightly tighter than OEM. They are a budget-friendly option for a quick repair during exhaust work, though they are not a multi-layer steel upgrade aimed at long-term high-boost performance. If you want a direct, easy replacement that restores a quiet, properly-sealed exhaust and correct engine behavior, these gaskets do the job for most routine repairs on Subaru turbo models.
Best for: Convenience-driven owners who need a quick, straightforward replacement to stop exhaust leaks and restore normal engine behavior without aftermarket upgrades.
Less Ideal for: Drivers planning high-boost modifications or seeking a long-term MLS upgrade should choose a performance-grade gasket designed for sustained high temperatures and pressure.
- Direct-fit design matching Subaru turbo manifold flange pattern
- Fiber-composite construction that seals well after proper installation
- Included pair covers both sides when replacing dual gaskets
- Affordable option for routine exhaust repairs
- Not a multi-layer steel (MLS) design so may not match longevity under high-boost or heavy duty use
- Limited to the specific Subaru turbo engine families listed, not universal to all Subaru models
Verdict A budget-friendly, direct-fit gasket set that reliably seals Subaru turbo exhaust manifolds for routine repairs but is not intended as a high-boost performance upgrade.
3. BRGMAX Exhaust Manifold Gasket Kit for Subaru WRX/STI (Single-Turbo EJ Engines)
| Fits for | 1991-2019 Single-Turbo EJ engines (various WRX/STI, Legacy, Forester XT, Outback XT models) |
|---|---|
| Includes | Exhaust manifold gasket (2), up-pipe to turbo gasket (1), up-pipe gasket (1), downpipe gasket (1) |
| Manufacturer | BRGMAX |
This BRGMAX gasket kit supplies the manifold and up/down-pipe seals needed when replacing or servicing the turbo on single-turbo Subaru EJ engines. It is used during turbo, manifold, or downpipe work to restore sealing between the exhaust manifold, up-pipe, and downpipe. The kit includes the exhaust manifold gaskets plus the specific up-pipe and downpipe gaskets for direct fit on many 1991–2019 EJ turbo models. In real-world use buyers report the multilayer gasket construction seals reliably when torqued to spec, making it a cost-effective alternative to higher-priced factory replacements. Fitment is focused on Subaru turbo variants and the kit simplifies a multi-gasket job by bundling the required pieces. Some users have reported intermittent sealing problems on imperfect flange surfaces and a few prefer factory gaskets for repeated service life, so careful flange prep and correct torque are important. For performance builds, this kit offers good value and straightforward fitment as long as mating surfaces are true.
Best for: Performance-oriented owners who prioritize reliable sealing during turbo or exhaust work and want a bundled, cost-effective gasket solution for Subaru EJ single-turbo builds.
Less Ideal for: Buyers seeking guaranteed factory-match longevity for repeated heavy-duty use or who prefer only OEM-branded parts should consider factory replacements instead.
- Complete kit includes manifold, up-pipe and downpipe gaskets for a single purchase
- Multilayer construction reported to seal well when installed and torqued correctly
- Designed specifically for Subaru single-turbo EJ engines covering common WRX/STI fitments
- Lower cost alternative to brand-name or factory replacement gaskets
- Some reports of poor sealing on imperfect or warped flange surfaces
- A few users prefer OEM gaskets for longer-term reliability in repeated service
Verdict A value-focused, full gasket kit that gives performance-minded Subaru EJ owners the parts needed for a turbo or exhaust job, provided mating surfaces are prepped carefully.
4. Hugwits 2-Pack 60mm Graphite Exhaust Manifold Donut Gasket (2.36" ID)
| Inner diameter | 2.36 inches (60mm) |
|---|---|
| Material | Graphite |
| Quantity | 2 pieces |
These Hugwits graphite donut gaskets are a budget-friendly pair designed to seal the connection between an exhaust manifold and the exhaust pipe. They slip over the pipe and compress when the flange is tightened, the graphite material conforming to surface imperfections to reduce leaks. Typical use is as a replacement gasket at the manifold-to-pipe joint during exhaust repairs or header swaps on a Subaru Impreza. The set includes two identical gaskets so you can replace both sides or keep a spare. Graphite construction offers good heat resistance and malleability, which helps achieve a tight seal even on slightly warped flanges, but the soft material can arrive slightly bent and should be reshaped carefully before installation. These gaskets are meant to be crushed and replaced when the joint is opened again, so they are not reusable. If you need a low-cost, simple repair part for an Impreza exhaust flange, these do the job; if you require an exact OEM match or a heavy-duty multi-layer steel solution for performance tuning, consider higher-end alternatives.
Best for: Budget-conscious Subaru Impreza owners who want an inexpensive, straightforward fix for a leaking manifold-to-pipe flange and prefer a simple replacement part they can fit during routine exhaust work.
Less Ideal for: Drivers doing high-performance header swaps or seeking a factory-quality multi-layer steel gasket for maximum longevity and repeated disassembly should choose a more robust, performance-oriented gasket instead.
- Includes two gaskets for a spare or dual-side replacement
- Graphite material conforms to flange imperfections for a reliable seal
- Compact universal 60mm (2.36" ID) size covers common manifold-to-pipe joints
- Low-cost option suitable for routine exhaust repairs on an Impreza
- Graphite ring is soft and can arrive slightly bent, requiring reshaping before install
- Designed to be crushed during installation and not reusable after disassembly
Verdict A very affordable graphite donut gasket set that reliably seals a Subaru Impreza manifold-to-pipe joint when you need a low-cost repair or spare.
5. Subaru Genuine Exhaust Manifold and Catalytic Converter Gasket Set
| Manufacturer | Subaru |
|---|---|
| Fits models | Legacy, Outback, Impreza, Forester (listed years) |
| Engine | 2.5 SOHC non-turbo (EJ253/EJ25i) |
This is a factory Subaru gasket kit that replaces the triangle exhaust gasket and the head pipe gaskets used at the manifold-to-catalytic-converter junction on 2.5 SOHC non-turbo engines. It is intended for use when replacing a leaking exhaust manifold or catalytic converter connection and is supplied as sealed OEM parts. Installation is straightforward for a technician or experienced DIYer: swap the old gaskets for the new pieces when reinstalling the head pipe and converter. The main benefit is factory-fit parts that restore proper sealing and help eliminate exhaust leaks, noise, and potential exhaust gas routing issues. Because these are genuine Subaru parts, they match factory mating surfaces and fastener locations, reducing the risk of fitment problems that can come with generic aftermarket gaskets. The kit is specific to non-turbo EJ25 applications, so it will not fit turbo variants or engines outside the listed model years and configurations.
Best for: Risk-averse owners seeking factory-quality replacement parts who prioritize correct fit and long-term sealing when servicing the exhaust manifold or catalytic converter on specified Subaru 2.5 SOHC models.
Less Ideal for: Owners who run turbocharged engines, have non-listed engine variants, or who need a full hardware repair kit including bolts and studs should consider other options.
- Genuine Subaru parts packaged sealed from the manufacturer
- Includes both triangle exhaust gasket and two head pipe gaskets for a complete seal at the manifold-to-cat joint
- Factory-fit design reduces risk of misalignment and simplifies installation
- Supplied specifically for EJ25 2.5 SOHC non-turbo applications, ensuring compatibility with listed models
- Fits only non-turbo 2.5 SOHC Subaru engines from the listed years and will not work for turbo models
- Contains just gaskets and not additional hardware such as new bolts or studs
Verdict A factory Subaru gasket set that restores a reliable seal for the manifold-to-cat junction on specified non-turbo 2.5 Subaru engines, ideal for buyers who want OEM fit and peace of mind.
6. Fel-Pro MS95088 Exhaust Manifold Gasket Set
| Brand | Fel-Pro |
|---|---|
| Model | MS95088 |
| Unit Count | 1.0 Count |
This Fel-Pro MS95088 gasket set supplies the manifold and header seals needed when replacing or servicing the exhaust manifold on compatible Subaru Impreza models. It is used during exhaust manifold/header removal and reinstallation to restore a tight seal that stops exhaust leaks, reduces noise, and prevents exhaust gas intrusion into the engine bay. The kit is engineered to meet factory-quality specifications and includes application-specific materials intended to withstand high heat around the exhaust ports. In practice the gaskets install like OEM replacements and users report reliable sealing after proper torque of fasteners. Limitations are that fit depends on selecting the correct vehicle application and one installation report noted a non-exact shape compared with the original, so careful fit verification is advised before final assembly. This is a straightforward, practical choice for a DIY or shop-level manifold gasket repair on an Impreza when you want a dependable, vehicle-specific replacement without extra aftermarket complexity.
Best for: Practical optimizers focused on doing a repair once and right will appreciate this set for routine exhaust manifold service on a Subaru Impreza because it balances reliability with straightforward installation.
Less Ideal for: If you need a custom high-performance header gasket for motorsport tuning or nonstandard exhaust hardware, this factory-style replacement is not the appropriate choice.
- Application-specific design aimed at matching factory fit and sealing surfaces
- Meets or exceeds original equipment specifications for reliable sealing under exhaust heat
- Includes all gaskets and seals required to remove and replace the exhaust manifold
- Widely used brand with many user reports of quieting header leaks after installation
- Not an exact physical duplicate of every OEM gasket shape in all cases so minor fit differences can occur
- Compatibility must be confirmed for the specific Impreza year/engine before installation
Verdict A dependable, vehicle-specific manifold gasket set that gives practical, factory-quality sealing for Subaru Impreza exhaust repairs.
7. Dorman Exhaust Manifold Hardware Kit (03413B)
| Manufacturer | Dorman Products |
|---|---|
| Model | 03413B |
| Manufacturer Part Number | 03413B |
| UPC | 037495029728 |
This Dorman exhaust manifold hardware kit supplies the fasteners needed to reattach a manifold after removal or repair. It is typically used during manifold gasket replacement, header swaps, or when original bolts and studs are rusted or broken. The kit is built from durable components intended to match factory function and to withstand repeated heat cycles common in the exhaust system. Practical benefits include saving time sourcing individual parts and restoring a proper seal between manifold and cylinder head. Several users report straightforward fitment and long service without failures when installed correctly and treated with anti-seize. Limitations: some reviewers note head sizes and thread ends can differ from factory originals so careful verification against the Impreza's parts is recommended, and anti-seize and correct torque are necessary to avoid removal problems later. The kit is a convenient, cost-effective option for routine exhaust manifold work on supported Subaru Impreza engines when matched to the correct application.
Best for: Balanced, practical owners who want a straightforward repair solution for exhaust manifold work on a Subaru Impreza and prefer a ready-made kit instead of hunting individual fasteners.
Less Ideal for: Do not choose this if you need factory-identical head geometry or are performing a precision restoration that requires exact original fastener profiles.
- Designed to replace the original manifold fasteners so you get a full set in one purchase
- Durable materials intended to handle exhaust heat cycles
- Saves time compared with sourcing individual bolts and studs
- Wide availability for common vehicle applications
- May not match every factory head dimension or thread end style exactly
- Some bolt heads and thread ends differ from factory sizes which can make installation fiddly
Verdict A convenient, durable kit that replaces worn or missing manifold fasteners for Subaru Impreza exhaust work, but verify head/bolt fit before installation.
Choosing the Right Subaru Impreza Exhaust Manifold: Key Factors to Consider
Fitment and Bolt Pattern
Accurate fitment is the first thing to check because bolt pattern and flange geometry determine whether the manifold mounts cleanly to the Impreza head. A manifold that does not align precisely can stress bolts and gaskets, leading to leaks and premature failure.
Make sure the design matches factory mounting locations and accounts for nearby components such as heat shields, sensors, and turbo plumbing when applicable. Ease of access to bolts during installation also matters; some manifolds route piping or flanges in ways that complicate removal and reinstallation.
Material and Thermal Resistance
Materials such as cast iron, stainless steel, and certain high-grade alloys behave differently under heat cycling. Cast iron offers good thermal mass and durability but can be heavier and prone to cracking if stressed. Stainless steel can resist corrosion and often handles thermal expansion better, but wall thickness and construction quality are important.
Consider how the material manages heat to prevent warping or cracking over time. Manifolds that dissipate heat more evenly can protect gaskets and nearby components, reducing the likelihood of heat-related failures.
Sealing Design and Gasket Interface
The flange surface quality and the gasket interface are central to preventing exhaust leaks. Flat, machined flanges with consistent thickness allow gaskets to seal reliably; warped or rough flanges make it difficult to achieve a durable seal. The choice of gasket type and the availability of proper replacement gaskets also affect long-term leak resistance.
Pay attention to whether the manifold design includes raised flanges, integrated sealing surfaces, or provisions for high-temperature gaskets. These features reduce the chance of exhaust gases escaping at the head-to-manifold junction.
Susceptibility to Cracking and Warping
Repeated heat cycles cause expansion and contraction that can eventually lead to cracks or warped flanges. Design features such as reinforcement ribs, thicker walls at stress points, and choice of alloy influence how well a manifold withstands these cycles.
Consider the typical driving conditions the vehicle will face, such as extended highway runs or stop-and-go city traffic, which can affect thermal stress. Manufacturers who account for thermal fatigue in the design will usually produce manifolds that last longer under real use.
Installation Complexity
Installation difficulty affects both time and the risk of errors. Some manifolds are direct bolt-on replacements with access to all fasteners, while others require partial removal of adjacent components or specialized tools. Tight clearances around the Impreza engine bay can make some installations challenging.
Think about whether you will install it yourself or use a technician. Simpler bolt-on designs reduce labor time and the chance of improper torqueing, which in turn lowers the risk of leaks and fastener failures.
Compatibility with Emissions and Sensors
Modern engines rely on sensors and emissions equipment that must be accommodated by the manifold design. Provision for oxygen sensor bungs, EGR passages, or catalytic converter attachment points is necessary for a compliant installation.
Confirm that the manifold supports the required sensor locations and emissions interfaces for the Subaru Impreza. Missing or misplaced sensor ports can lead to check-engine lights, drivability problems, or the need for additional adapters.
FAQ
What are common exhaust manifold symptoms on a Subaru Impreza?
Common symptoms often include a ticking or tapping noise during cold starts that may become louder under load, reduced engine responsiveness, and a noticeable exhaust odor in the engine bay. You may also see soot or discoloration around the flange area, which can indicate a leak.
How can I diagnose an exhaust manifold leak?
Diagnosis usually starts with a visual inspection for cracks, soot, or loose bolts. A smoke test or listening for changes in sound while a helper revs the engine can help pinpoint leaks. Be cautious working around a hot engine; many owners wait until the engine is cool to inspect and tighten fasteners if needed.
When should I replace the exhaust manifold gasket?
Replace the gasket if you detect persistent exhaust noise at the flange, visible soot, or if the gasket is damaged during removal. Gaskets often fail before the manifold itself, and replacing the gasket when reassembling is good practice to ensure a reliable seal.
Can a cracked exhaust manifold be repaired or does it need replacement?
Small cracks in some materials can sometimes be welded, but repairability depends on the material, crack location, and extent of heat damage. Welding can be a temporary fix; many owners opt for full replacement to restore long-term reliability and avoid repeat failures.
Will swapping an exhaust manifold affect engine performance?
Swapping to a properly fitted manifold can restore lost performance caused by leaks or restrictive flow. However, changes in manifold design can alter exhaust flow characteristics and should be chosen with attention to engine tuning and sensor placement to avoid unintended effects.
How much does installation typically impact the overall cost?
Installation complexity influences labor time; a direct bolt-on manifold with good access usually takes less time than one requiring removal of adjacent components. Expect variation depending on the shop and vehicle condition, and factor in potential additional work like replacing gaskets or bolting hardware.
How We Chose the Best Subaru Impreza Exhaust Manifold
We evaluated candidates based on factors that affect real-world use on the Subaru Impreza. Key criteria included fitment accuracy to factory mounting points, thermal performance and resistance to warping or cracking, material and construction quality, and flange and gasket sealing features. We also considered the manifolds ease of installation in a typical Impreza engine bay and whether design choices would interfere with nearby components such as heat shields, turbocharger plumbing, or sensors. Durability under repeated heat cycles and resistance to corrosion were used to assess long-term value. Finally, we reviewed documented reports of common failure modes to favor designs that reduce leak risk. We excluded items that require major vehicle modification or extensive custom fabrication, and we did not consider options that lack clear fitment information for the Subaru Impreza. The result is a focused list of manifolds that meet practical fit, durability, and installation expectations for this vehicle.
Our full evaluation process is outlined in our review methodology.
Conclusion
Focus on fitment, material quality, and sealing features when choosing an exhaust manifold for a Subaru Impreza. Prioritize designs that match factory mounting points, provide durable flange surfaces, and resist thermal fatigue to reduce the chance of leaks and repeat repairs. Balance installation complexity against long-term reliability. If you need easier installation, favor direct-fit options with clear sensor provisions; if longevity under heavy use is the priority, emphasize material and construction that manage heat and stress well.
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