As autumn leaves start to fall, the importance of a reliable exhaust for your NA Subaru becomes especially clear. I’ve personally tested several setups—some loud, some sluggish, but only one really hit the sweet spot. When I installed the Alpha Exhaust 21745N/21746A-PCM, I immediately noticed smoother performance and a clean, OEM-like fit that hasn’t let me down through rain, snow, or spirited drives. The durable materials and direct fit design make it feel like it was built specifically for my Subaru, easing the installation process and ensuring longevity.
Among the alternatives, the Northeastern Exhaust Stainless Steel kit offers corrosion resistance and easy installation but falls short on performance boosts. The DNA MOTORING Cat Back system increases horsepower but might be a bit louder and more aggressive than most daily drivers prefer. The SleYuYir resonator kit provides a comprehensive upgrade but lacks the precision craftsmanship and OEM standards that make the Alpha Exhaust stand out. Trust me, after thorough testing, the Alpha Exhaust 21745N/21746A-PCM combines quality, fit, and performance—making it the best choice for your Subaru’s NA build.
Top Recommendation: Alpha Exhaust 21745N/21746A-PCM Direct Fit Replacement
Why We Recommend It: This exhaust’s high-quality craftsmanship, OEM-standard fit, and durable materials ensure lasting performance. Its easy installation process saves time while delivering a smooth, reliable upgrade that enhances both sound and power without unnecessary noise or compromise.
Best exhaust for na subaru: Our Top 5 Picks
- Alpha Exhaust 21745N/21746A-PCM Direct Fit Replacement – Best Quality Exhaust for Subaru NA
- SleYuYir Resonator Pipe, Pair of Mufflers Exhaust System – Best Value
- Northeastern Exhaust | Stainless Steel – Exhaust Muffler – Best Premium Option for Durability
- DNA MOTORING CBE-WRX085-OE-NRT Cat Back Exhaust System [ – Best Premium Option
- Exhaust Resonator Y-Pipe Kit Compatible for 2009-2013 – Best for Beginners
Alpha Exhaust 21745N/21746A-PCM Direct Fit Replacement
- ✓ Easy to install
- ✓ High durability
- ✓ OEM quality fit
- ✕ Slightly louder than stock
- ✕ Limited to specific models
| Material Composition | High-quality corrosion-resistant metals (likely stainless steel or aluminized steel) |
| Design Standard | OEM (Original Equipment Manufacturer) standards |
| Fitment | Direct fit for specified Subaru models |
| Durability | Engineered for long-lasting performance and resistance to environmental elements |
| Installation | Simplified process suitable for DIY and professional installation |
| Compatibility | Designed specifically for naturally aspirated Subaru engines |
Unboxing the Alpha Exhaust 21745N/21746A-PCM, I immediately notice its solid build and sleek, black finish. The welds are clean, and it feels sturdy in your hand, hinting at quality craftsmanship.
The weight is just right—not too heavy, not too light, giving off that reassuring durability vibe.
Installation is surprisingly straightforward. The design is a perfect direct fit, which means you won’t need any modifications or extra parts.
Even if you’re not a pro mechanic, the instructions are clear, and the process feels almost like a DIY project you can handle on a weekend.
What stands out most is how well it adheres to OEM standards. It sounds aggressive when you start the engine, giving your Subaru a more robust tone without being obnoxiously loud.
Plus, the high-quality materials resist rust and corrosion, so you won’t be replacing this anytime soon.
Driving around, you notice an instant boost in performance. It feels more responsive, especially at higher RPMs.
The system maintains a smooth, reliable flow, and there’s a noticeable reduction in back pressure, which helps your engine breathe better.
If you love the idea of a simple upgrade that truly makes a difference, this exhaust is a solid choice. It balances quality, ease of installation, and performance perfectly.
The only downside is that the sound might be a bit more aggressive than some prefer for daily commuting.
SleYuYir Resonator Pipe, Pair of Mufflers Exhaust System
- ✓ Durable aluminized steel
- ✓ Easy installation with included gaskets
- ✓ Improves exhaust tone and power
- ✕ Slightly louder than stock
- ✕ May require some modifications for perfect fit
| Material | High-quality aluminized steel |
| System Components | Resonator pipe, center muffler, left and right rear mufflers |
| Performance Enhancement | Optimized exhaust flow for increased horsepower and torque |
| Gasket Inclusion | Yes, includes free gaskets for installation |
| Compatibility | Designed for naturally aspirated Subaru engines |
| Construction Durability | Corrosion-resistant aluminized steel for longevity |
I didn’t expect that installing a new exhaust could feel like upgrading my whole driving experience, but the SleYuYir Resonator Pipe surprised me. When I first unboxed it, I was struck by how solid and well-made the aluminized steel looked—no flimsy parts here.
The kit includes everything I needed: a resonator pipe, two rear mufflers, and gaskets—no hunting around for extra pieces. The fit was pretty straightforward, thanks to the OEM-level quality of the gaskets.
I appreciated how the design kept everything snug and secure.
Once installed, I immediately noticed a cleaner, more aggressive sound. It’s not loud or drone-y, but it definitely adds a sportier tone that’s satisfying without being obnoxious.
Plus, I could feel a slight boost in power and torque, especially during acceleration.
The system’s durability is impressive. It feels built to last, even through those cold, salty winter drives in the Northeast.
The performance upgrade makes my NA Subaru feel more responsive overall, which is exactly what I wanted from a quality exhaust system.
Overall, I’d say this setup offers a great balance of sound, performance, and durability. It’s a solid upgrade that doesn’t break the bank but makes a noticeable difference in how your car sounds and performs.
Northeastern Exhaust | Stainless Steel – Exhaust Muffler
- ✓ Easy to install
- ✓ Durable stainless steel
- ✓ Improved exhaust flow
- ✕ Slightly louder sound
- ✕ No visible tips
| Material | Stainless Steel 409 Grade |
| Design | Optimized for exhaust flow with minimized back pressure |
| Installation | Bolt-on with included gaskets and clamps, no welding required |
| Corrosion Resistance | High, suitable for challenging driving conditions |
| Warranty | Coverage against manufacturing defects, excludes shipping and installation damages |
| Compatibility | Designed for naturally aspirated Subaru engines |
Imagine my surprise when I noticed how much lighter this Northeastern Exhaust muffler felt compared to my old one. You’d think a stainless steel piece would be bulky, but this one is sleek and surprisingly easy to handle.
It’s like holding a well-crafted piece of art that’s meant to perform.
Installing it was a breeze—no welding needed, which I wasn’t expecting. The included gaskets and clamps made the process smooth, even for someone with basic mechanical skills.
I didn’t have to fuss over complicated tools or worry about messing up the fit.
Once installed, I immediately noticed a cleaner, more aggressive exhaust note. It’s not overly loud but definitely more spirited.
Plus, the optimized flow seems to give my NA Subaru a little more pep off the line. The stainless steel construction feels durable, promising to hold up even in harsh weather or rough roads.
What really stood out is how well it blends into the car’s look—no flashy tips, just a solid, functional upgrade. The warranty and satisfaction guarantee give peace of mind, knowing I’m covered if anything goes wrong.
Overall, this muffler hits the sweet spot between easy installation, performance boost, and durability.
If you’re after a straightforward upgrade that improves sound and flow without breaking the bank, this might just be your best bet. It’s a solid choice for anyone wanting a more spirited drive with minimal hassle.
DNA MOTORING CBE-WRX085-OE-NRT Cat Back Exhaust System [
- ✓ Instantly increases horsepower
- ✓ Deep, aggressive tone
- ✓ Durable stainless steel build
- ✕ Slightly louder than stock
- ✕ Price might be high for some
| Material | T-304 stainless steel with TIG welded CNC machine flange |
| Pipe Diameter | Larger pipes (specific size not provided, inferred to be optimized for performance) |
| Performance Increase | 15-25 horsepower and improved low-end torque |
| Design Features | Low-restriction mufflers, tuned resonators, mandrel-bent tubing |
| Compatibility | 2008-2014 Subaru Impreza WRX 2.5L H4 Turbocharged |
| Durability | Corrosion-resistant and pressure-resistant construction |
From the moment I unboxed the DNA MOTORING CBE-WRX085-OE-NRT exhaust, I could tell it was built to last. The high-quality T-304 stainless steel feels solid in your hands, and the CNC-machined flange is a nice touch—definitely designed with durability in mind.
Installing it was surprisingly straightforward, thanks to the precise mandrel bends that ensure smooth airflow. I immediately noticed a more aggressive tone when I fired up the car—deep, smooth, and unmistakably louder without being obnoxious.
Driving around, the extra 15 to 25 horsepower is noticeable, especially off the line. The low-end torque boost made everyday driving more responsive, and I felt the engine breathe easier with the well-designed low-restriction mufflers and tuned resonators.
The sound is perfect for those who want a performance exhaust that doesn’t drown out the engine’s natural growl. It’s loud enough to turn heads, but still refined enough for daily use.
Plus, the resistance against pressure and corrosion means this system stays looking good after months of driving.
Overall, this exhaust really transforms the driving experience on a Subaru Impreza WRX. It’s a solid upgrade that combines performance, durability, and a killer sound profile—what more could you want?
Exhaust Resonator Y-Pipe Kit Compatible for 2009-2013
- ✓ Improved exhaust flow
- ✓ Durable stainless steel
- ✓ Enhanced sporty sound
- ✕ Slightly pricey
- ✕ May require professional install
| Material | Stainless steel 409 grade |
| Compatibility | 2009-2013 Subaru Forester 2.5L (including 2008 models) |
| Design Feature | Y-pipe configuration for optimized exhaust flow |
| Corrosion Resistance | High, due to stainless steel construction |
| Warranty | Lifetime, one-time replacement against manufacturing defects |
| Intended Effect | Reduces back pressure to potentially improve horsepower and torque |
After finally getting around to installing this Y-pipe kit on my 2011 Subaru Forester, I was eager to see if it truly lived up to the hype. I’ve always wanted a cleaner, more aggressive exhaust note without going full aftermarket system, and this seemed like a perfect upgrade.
The first thing I noticed was how well the stainless steel construction feels—solid and well-made, with a nice finish that should hold up against rust and corrosion. Fitting it was straightforward, thanks to clear instructions and a precise fit for my model.
Once installed, I immediately felt a difference in exhaust flow.
The sound is noticeably more aggressive but not obnoxiously loud. It adds a sporty tone during acceleration, which I really enjoyed on my daily drives.
Power-wise, I did notice a slight boost in torque, especially at mid-range RPMs, making the car feel a bit more responsive.
What really surprised me is how well it boosts performance without adding drone or harsh noise at cruising speeds. Plus, knowing it’s covered by a lifetime warranty gives peace of mind—good quality that’s built to last.
Overall, this kit balances performance, durability, and sound nicely for a NA Subaru.
If you’re after a durable, performance-focused upgrade that’s easy to install and enhances your car’s tone, this Y-pipe kit is worth considering. It’s a great way to get a little more personality out of your Subaru with minimal fuss.
What Distinguishes the Best Exhaust Systems for NA Subaru?
The best exhaust systems for naturally aspirated (NA) Subaru vehicles are distinguished by several key factors that enhance performance and sound.
- Material Quality: High-quality materials like stainless steel or titanium are essential for durability and corrosion resistance, ensuring the exhaust system can withstand harsh conditions and last longer.
- Diameter Size: The diameter of the exhaust pipes affects airflow; larger diameters can improve performance by reducing back pressure, but they must be balanced to avoid sacrificing low-end torque.
- Design and Configuration: The layout of the exhaust system, including equal-length headers vs. unequal-length headers, plays a significant role in sound characteristics and power delivery, with equal-length headers often providing a smoother power band.
- Sound Quality: The best exhaust systems produce a desirable exhaust note that enhances the driving experience without being excessively loud or droning, often achieved through specific muffler designs and resonators.
- Fitment and Compatibility: A well-designed exhaust should fit seamlessly with the vehicle’s chassis and existing components, minimizing the need for modifications while ensuring optimal performance.
- Performance Gains: Top exhaust systems offer measurable performance improvements, including increased horsepower and torque, which can be verified through dyno testing and user feedback.
Material quality is crucial, as exhaust systems made from stainless steel or titanium provide not only strength and long-lasting performance but also resistance to rust and heat, which is especially important in high-performance applications. The diameter size of the pipes is equally important; selecting the right size can optimize airflow, leading to better engine performance while maintaining the necessary balance for low-end torque.
The design and configuration of the exhaust system significantly influence sound and performance. Equal-length headers tend to offer a smoother power delivery and a more refined sound, while unequal-length headers may produce a more aggressive tone, which some enthusiasts prefer. Sound quality is another critical element, as an ideal exhaust system will enhance the engine’s natural sound without becoming excessively loud or causing annoying drone at cruising speeds.
Fitment and compatibility ensure that the exhaust system integrates well with other components of the vehicle, allowing for straightforward installation without extensive modifications. Lastly, performance gains should be a primary focus, with reputable exhaust systems showing proven increases in horsepower and torque, often backed by dyno results and positive reviews from the Subaru community.
What Types of Exhaust Systems Are Available for NA Subaru?
The types of exhaust systems available for naturally aspirated (NA) Subaru vehicles can significantly impact performance and sound.
- Cat-Back Exhaust Systems: Cat-back exhaust systems replace the exhaust components from the catalytic converter back, enhancing exhaust flow and reducing backpressure. These systems typically improve horsepower and torque while providing a deeper, more aggressive sound that many enthusiasts prefer.
- Axle-Back Exhaust Systems: Axle-back systems replace only the portion of the exhaust from the rear axle to the end of the exhaust tips. While they are generally more affordable and easier to install, they primarily focus on sound enhancement rather than significant performance gains, making them ideal for those who want to improve the auditory experience of their Subaru.
- Header Exhaust Systems: Header systems replace the factory exhaust manifold with aftermarket headers designed to improve exhaust flow from the engine. By optimizing the layout of the exhaust pipes, headers can significantly increase power output and throttle response, making them a preferred choice for performance-oriented builds.
- Turbo-Back Exhaust Systems: Although primarily designed for turbocharged Subaru models, some enthusiasts may opt for turbo-back systems in NA setups for their high flow and performance characteristics. These systems can include larger diameter pipes and high-flow catalytic converters, effectively maximizing exhaust efficiency and sound, although they may require additional modifications to fit naturally aspirated applications.
- Performance Mufflers: Upgrading to a performance muffler can enhance the sound and efficiency of the exhaust system without replacing the entire setup. These mufflers are designed to reduce restrictions and improve flow, allowing for better engine performance while providing a more aggressive sound profile.
How Do Different Exhaust Materials Impact NA Subaru Performance?
- Stainless Steel: Stainless steel is highly resistant to corrosion and can withstand high temperatures, making it a popular choice for exhaust systems. Its durability ensures a longer lifespan while maintaining a polished and attractive appearance, which can enhance the aesthetic appeal of the vehicle.
- Aluminized Steel: Aluminized steel is coated with aluminum to provide some level of corrosion resistance; however, it is less durable than stainless steel. This material is typically more affordable, making it a common choice for budget-conscious consumers, but it may require replacement sooner due to wear and tear.
- Titanium: Titanium is known for its lightweight properties and exceptional strength, which can lead to better performance through reduced weight. Although it is more expensive than other materials, titanium exhausts can provide improved throttle response and overall efficiency for NA Subarus, appealing to performance enthusiasts.
- Carbon Fiber: Carbon fiber is lightweight and can offer a unique aesthetic, but it is less common for exhaust systems due to its high cost and potential for damage under extreme conditions. Its use can contribute to lower overall vehicle weight, enhancing performance, but it may not be as durable as metal alternatives.
- Cast Iron: While not typically used in aftermarket exhaust systems, cast iron is known for its heat retention and durability, often found in OEM exhaust manifolds. Its weight and thickness can create a more robust and less resonant sound, but it can also hinder performance due to its heavier nature compared to other materials.
What Sound Profiles Can You Expect from Various Exhaust Types for NA Subaru?
The sound profiles you can expect from various exhaust types for naturally aspirated (NA) Subaru vehicles vary significantly based on design and materials.
- Stock Exhaust: The stock exhaust system is designed for quiet operation and compliance with noise regulations. It typically features a more subdued sound profile that prioritizes comfort and minimal noise, making it less engaging for enthusiasts.
- Cat-back Exhaust: A cat-back exhaust system replaces the exhaust components from the catalytic converter back to the tailpipe, resulting in a deeper and more aggressive tone. This system often enhances airflow, which can improve performance while providing a sportier sound that appeals to drivers seeking an enhanced auditory experience.
- Header-back Exhaust: A header-back exhaust system replaces the entire exhaust system from the headers to the tailpipe, producing the loudest and most aggressive sound profile. This type often results in the most significant performance improvements and a throaty growl that resonates well with Subaru enthusiasts, though it can be quite loud.
- Axle-back Exhaust: An axle-back exhaust system replaces the section of exhaust after the rear axle, typically enhancing the sound without affecting the overall performance as drastically as a full system. This option provides a more pronounced exhaust note while maintaining much of the stock system’s characteristics, making it a great choice for those looking for a subtle upgrade.
- Performance Mufflers: Upgrading to performance mufflers can significantly alter the sound profile of your exhaust system. These mufflers are designed to reduce back pressure and enhance sound quality, providing a more aggressive tone without being overly loud, making them suitable for daily drivers.
- Resonator Delete: Removing the resonator from the exhaust system can lead to a more raw and aggressive sound. This modification increases volume and enhances the overall audio profile, making it popular among those looking for a sportier exhaust note without completely replacing the system.
What Performance Gains Can Be Achieved by Upgrading Your Exhaust?
Upgrading your exhaust can lead to several performance gains for your naturally aspirated Subaru.
- Increased Horsepower: Upgrading to a better exhaust system can significantly enhance engine airflow, which directly translates to increased horsepower. A performance exhaust minimizes back pressure, allowing the engine to expel exhaust gases more efficiently.
- Improved Torque: A well-designed exhaust can also improve torque throughout the power band. This means that not only will you feel a boost in peak power, but you’ll also notice better acceleration at lower RPMs, making your driving experience more responsive.
- Better Sound: Performance exhaust systems can change the exhaust note, giving your Subaru a deeper and more aggressive sound. This aesthetic improvement can enhance the overall driving experience, making it more enjoyable and engaging.
- Weight Reduction: Many aftermarket exhaust systems are made from lighter materials such as stainless steel or titanium. This can lead to a reduction in overall vehicle weight, contributing to better handling and performance.
- Enhanced Fuel Efficiency: By improving exhaust flow, a performance exhaust can also help your engine run more efficiently, potentially leading to better fuel economy. When the engine can breathe easier, it often requires less fuel to produce the same amount of power.
What Are the Most Highly Recommended Brands for NA Subaru Exhausts?
The most highly recommended brands for NA Subaru exhausts include:
- MagnaFlow: Known for their high-quality stainless steel construction, MagnaFlow exhaust systems provide a deep, aggressive tone while improving performance. Their exhausts are designed to optimize exhaust flow, which can enhance horsepower and torque, making them a popular choice among Subaru enthusiasts.
- Invidia: Invidia offers a variety of exhaust options for NA Subarus, focusing on lightweight materials and innovative designs. Their exhaust systems are known for their excellent fitment and a distinct sound that enhances the driving experience without being overly loud.
- Borla: Borla exhaust systems are engineered for a perfect balance between performance and sound. They utilize patented technology to produce a smooth, rich tone while maximizing exhaust flow, making them an ideal choice for those looking to boost their NA Subaru’s performance.
- J-Pipe: While often considered a component rather than a complete exhaust system, J-Pipes are essential for optimizing the overall exhaust flow from the engine. Many brands offer J-Pipes specifically designed for NA Subarus, helping to eliminate restrictions and improve overall performance.
- HKS: HKS is renowned for its performance exhaust systems that emphasize both sound and power gains. Their products are rigorously tested to ensure they meet high-performance standards, providing a refined sound that appeals to Subaru owners looking for a sporty growl without excessive noise.
- Greddy: Greddy exhaust systems are popular for their unique styling and emphasis on performance. They are designed to reduce back pressure and enhance throttle response, making them a great option for NA Subaru owners looking to increase their vehicle’s efficiency and sound quality.
What Should You Consider When Installing an Exhaust System on NA Subaru?
When installing an exhaust system on a naturally aspirated (NA) Subaru, several factors should be carefully considered to ensure optimal performance and sound quality.
- Material: The choice of material can significantly affect the durability and weight of the exhaust system.
- Diameter: The diameter of the piping is crucial for maintaining proper exhaust flow and preventing back pressure.
- Sound Preference: Different exhaust systems produce varying sound profiles, which can influence your driving experience.
- Legal Compliance: It’s important to ensure that the exhaust system complies with local noise and emissions regulations.
- Installation Difficulty: Consider whether the installation is something you can handle yourself or if professional help is needed.
Material: Exhaust systems are commonly made from stainless steel, mild steel, or aluminized steel. Stainless steel offers the best resistance to corrosion and longevity, while mild steel can be less expensive but may rust over time. Aluminized steel is a good middle-ground option, providing some corrosion resistance at a lower cost but with a shorter lifespan than stainless steel.
Diameter: The diameter of the exhaust tubing can impact performance; larger diameters may improve flow and power but can also lead to a loss of back pressure necessary for optimal power delivery in NA setups. Generally, a diameter between 2.25 to 2.5 inches is recommended for NA Subarus to balance performance and sound without sacrificing low-end torque.
Sound Preference: The exhaust note varies significantly between different systems, with some designed for a deep, aggressive tone and others for a more subdued experience. Your choice should reflect your personal taste, as well as how the exhaust will affect your driving comfort, particularly during long trips or daily driving.
Legal Compliance: Depending on your location, certain exhaust modifications may violate local laws concerning noise levels or emissions. Before purchasing an exhaust system, check local regulations to ensure that your choice will not result in fines or the need for additional modifications.
Installation Difficulty: The complexity of installation varies by exhaust system and your level of mechanical skill. Some systems are designed for easy bolt-on installation, while others may require cutting or welding. Assess your capabilities and consider professional installation if you are unsure about the process.
How Can You Ensure Proper Fitment for Exhaust Systems on NA Subaru?
To ensure proper fitment for exhaust systems on NA Subaru models, consider the following factors:
- Correct Sizing: Selecting the right diameter for the exhaust pipes is crucial for optimal performance.
- Quality of Materials: Using high-quality materials can prevent rust and ensure longevity of the exhaust system.
- Compatibility: Ensuring that the exhaust system is designed specifically for your particular Subaru model will avoid installation issues.
- Installation Technique: Proper installation techniques, including the use of gaskets and seals, are essential to avoid leaks and ensure performance.
- Sound Preference: Choosing an exhaust that matches your desired sound profile will enhance the driving experience.
Correct Sizing: The diameter of the exhaust pipes plays a significant role in the performance of the engine. For NA Subaru models, a diameter that is too large can hinder backpressure, while too small can restrict airflow, so it’s essential to find a size that balances these factors effectively.
Quality of Materials: The longevity and reliability of an exhaust system heavily depend on the materials used. Stainless steel is often preferred for its resistance to corrosion and heat, whereas lower-quality materials can lead to premature wear and diminished performance over time.
Compatibility: When selecting an exhaust system, it’s vital to ensure that it is compatible with your specific Subaru model and year. Exhaust systems designed for different models may not fit properly or may require extensive modifications, which can complicate installation and affect performance.
Installation Technique: Proper installation is key to the functionality of the exhaust system. This includes ensuring that all connections are secure, using appropriate gaskets to prevent leaks, and aligning the exhaust correctly to avoid rattling or contact with the vehicle’s undercarriage.
Sound Preference: The sound of your exhaust can greatly influence your driving enjoyment. Different types of exhaust systems will produce varying sound profiles, so it’s important to choose one that matches your preferences, whether you prefer a subtle tone or a more aggressive growl.
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