When upgrading your Subaru’s exhaust, the goal is often more than just aesthetics or minor performance gains; it’s about achieving that distinctive, engaging sound. Our team at MustCarBeast has thoroughly researched and compared a wide range of aftermarket exhaust systems specifically designed for various Subaru models. We focused on systems that consistently deliver an improved auditory experience, evaluating manufacturer specifications, sound clips, and aggregated owner feedback to identify the top contenders.
In our evaluation, we prioritized factors such as sound profile (from subtle enhancement to aggressive roar), build quality, material durability, and the presence or absence of undesirable drone. We understand that “best sounding” is subjective, so our guide aims to cover a spectrum of preferences, ensuring you can make an informed decision based on our comprehensive analysis.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Invidia R400 Cat-Back Exhaust Top Pick for Aggressive Sound 3-inch piping, quad titanium tips |
9.0 | 🛒 Check Price |
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Borla S-Type Cat-Back Exhaust Best Refined Performance T-304 stainless steel, S-Type muffler design |
8.6 | 🛒 Check Price |
 |
Remark Axle-Back Exhaust Best Value & Easy Upgrade T304 stainless steel, bolt-on axle-back design |
8.3 | 🛒 Check Price |
 |
ETS Extreme Cat-Back Exhaust Ultimate Loud & Proud Large diameter piping, minimal muffling |
8.0 | 🛒 Check Price |
 |
Nameless Performance Axle-Back Exhaust Best Subtle Enhancement T304 stainless steel, muffler delete or 5-inch muffler options |
7.8 | 🛒 Check Price |
 |
Corsa Sport Cat-Back Exhaust Drone-Free Driving Patented Reflective Sound Cancellation (RSC) technology |
7.5 | 🛒 Check Price |
 |
MagnaFlow Street Series Cat-Back Exhaust Balanced Daily Driver Straight-through muffler design, 100% stainless steel |
7.2 | 🛒 Check Price |
1. Invidia R400 Cat-Back Exhaust: Top Pick for Aggressive Sound
In our evaluation, the Invidia R400 stands out for its undeniably aggressive sound profile, which is precisely what many Subaru enthusiasts seek. The deep rumble and pronounced roar under acceleration are consistently praised in owner feedback. However, this aggressive nature comes with a caveat: its volume can be significant, potentially leading to drone, a persistent low-frequency hum, during sustained highway cruising. We found that while some owners tolerate this for the overall sound experience, others may find it fatiguing on longer journeys.
Drivers who prioritize a quieter cabin or live in areas with strict noise ordinances might find the R400 to be an unsuitable choice. This system is best suited for those who desire a truly commanding exhaust note and are willing to accept a louder daily driving experience in exchange for its distinctive auditory signature.
- Delivers a deep, aggressive, and resonant exhaust note.
- Constructed from high-quality T304 stainless steel for longevity.
- Designed for optimal exhaust flow, contributing to potential performance gains.
Pros: Very noticeable and satisfying sound improvement; Excellent build quality and finish; Popular choice for a truly sporty character
Cons: Can be perceived as too loud by some drivers; Potential for drone at certain RPMs
2. Borla S-Type Cat-Back Exhaust: Best Refined Performance
Based on our research, the Borla S-Type system consistently earns high marks for its ability to deliver a sporty sound without the intrusive drone often associated with aftermarket exhausts. Borla’s patented S-Type muffler technology effectively cancels out unwanted frequencies, making for a more pleasant daily driving experience. While the sound is undoubtedly an improvement over stock, it maintains a level of refinement that might not satisfy those seeking the absolute loudest or most raw exhaust note.
Individuals who desire an extremely aggressive or ear-splitting exhaust volume should consider other options. The Borla S-Type is ideally suited for drivers who appreciate a sophisticated, performance-oriented sound that enhances the driving experience without sacrificing cabin comfort or attracting excessive attention.
- Produces a classic, sporty sound with minimal cabin drone.
- Features mandrel-bent T-304 stainless steel for maximum flow and durability.
- Designed for a refined, yet distinct, auditory upgrade.
Pros: Excellent balance of sound volume and tone; Virtually drone-free operation at cruising speeds; Premium construction and fitment
Cons: Less aggressive than some competitors; Higher investment compared to axle-back options
3. Remark Axle-Back Exhaust: Best Value & Easy Upgrade
In our comparison, the Remark Axle-Back system stands out as an excellent entry point for Subaru owners looking to improve their vehicle’s sound without committing to a full cat-back system. Its bolt-on design and straightforward installation process are frequently highlighted in owner feedback, making it an appealing option for those new to exhaust modifications. However, as an axle-back system, it only replaces the rear section of the exhaust, meaning the overall sound transformation is less comprehensive than what a full cat-back can offer. The mid-pipe and catalytic converter remain stock, which limits the potential for a truly radical sound change or significant performance gains.
Drivers who are seeking a complete exhaust overhaul, including a substantial increase in volume and a more aggressive tone throughout the entire RPM range, might find the Remark Axle-Back to be insufficient. This system is best for those who want a noticeable, yet not overwhelming, sound upgrade and value ease of installation and a sensible investment.
- Offers a cost-effective way to enhance exhaust sound.
- Simple bolt-on installation, making it accessible for DIY enthusiasts.
- Provides a deeper, more aggressive tone than the factory setup.
Pros: Significant sound upgrade for the investment; Easy and quick installation process; Available in various tip styles
Cons: Limited impact on overall exhaust flow compared to cat-backs; Sound change is less dramatic than full systems
4. ETS Extreme Cat-Back Exhaust: Ultimate Loud & Proud
Our research indicates that the ETS Extreme Cat-Back Exhaust lives up to its name by offering one of the loudest and most aggressive sound profiles available for Subaru vehicles. It is designed with minimal muffling and large diameter piping to maximize exhaust flow and volume, making it a favorite among track enthusiasts and those who truly want their car to be heard. However, this extreme volume comes with the trade-off of considerable cabin drone, which can be particularly pronounced during highway cruising. The sheer loudness of this system means it can be intrusive for passengers and may even exceed local noise regulations in residential areas.
This exhaust is not recommended for daily drivers who value a quiet ride, or for individuals sensitive to drone. It is best suited for dedicated track vehicles, show cars, or owners who are fully prepared for a consistently very loud driving experience and prioritize maximum exhaust presence above all else.
- Delivers an extremely loud and raw exhaust note.
- Designed for maximum exhaust flow, ideal for high-performance builds.
- Constructed with robust materials for demanding use.
Pros: Unmistakably aggressive and commanding sound; Optimized for maximum exhaust flow; Durable construction for track or aggressive driving
Cons: Can be excessively loud for daily driving; Significant potential for cabin drone; May not be street legal in all regions
5. Nameless Performance Axle-Back Exhaust: Best Subtle Enhancement
Based on owner feedback and product specifications, the Nameless Performance Axle-Back Exhaust is highly regarded for its ability to deliver a noticeable, yet refined, sound enhancement. The option to choose between a muffler delete or various muffler sizes allows for a degree of sound customization, catering to those who want a bit more rumble without the extreme volume. Its precise fitment and ease of installation are frequently praised. However, as an axle-back system, it does not replace the entire exhaust path, limiting the overall depth and aggression of the sound compared to a full cat-back system.
Drivers seeking a truly aggressive, high-volume exhaust note, or those looking for potential performance gains associated with full exhaust flow optimization, should consider a complete cat-back setup. The Nameless Performance system is ideal for individuals who desire a quality, well-fitting exhaust that provides a clean, sporty sound without the risk of excessive loudness or drone.
- Provides a clean, sporty sound without being overly loud.
- Offers customizable sound levels with muffler delete or various muffler sizes.
- Known for excellent fitment and straightforward installation.
Pros: Quality construction and precise fitment; Option for a subtle or slightly more aggressive tone; Lightweight design
Cons: Axle-back only, less comprehensive sound change; Sound may be too subtle for some performance enthusiasts
6. Corsa Sport Cat-Back Exhaust: Drone-Free Driving
Our evaluation of the Corsa Sport Cat-Back system highlights its primary advantage: the patented Reflective Sound Cancellation (RSC) technology, which effectively eliminates drone during highway cruising. This makes it an outstanding choice for those who want an aggressive sound when they press the accelerator, but a quiet and comfortable cabin on long drives. This advanced technology and premium construction, however, contribute to a higher investment compared to many other aftermarket exhausts, a factor consistently noted in our research.
Individuals who are looking for the loudest possible exhaust or prioritize extreme volume above all else might find the Corsa Sport’s controlled sound profile to be less exhilarating than more aggressive, drone-prone systems. This system is best suited for drivers who prioritize a premium, drone-free driving experience and are willing to make a higher investment for that specific benefit.
- Features patented RSC technology to eliminate drone at cruising speeds.
- Delivers an aggressive sound under acceleration but remains quiet while cruising.
- Constructed from premium stainless steel for enhanced longevity.
Pros: Virtually no drone, excellent for daily driving; Premium sound quality under load; High-grade materials and construction
Cons: Higher investment than many alternatives; Sound might be considered too quiet by some seeking extreme volume
7. MagnaFlow Street Series Cat-Back Exhaust: Balanced Daily Driver
Based on our research and aggregated owner feedback, the MagnaFlow Street Series Cat-Back Exhaust offers a well-balanced approach to sound enhancement for Subaru vehicles. It delivers a deeper, smoother tone than the factory exhaust, with a moderate volume that is generally well-received for daily driving, avoiding the extremes of loudness or drone. However, this balanced approach can sometimes result in a sound profile that is less distinctive or unique compared to systems from brands known for very specific acoustic characteristics. While it’s a definite upgrade, it might not provide the unique auditory signature some enthusiasts crave.
Drivers who are searching for a very specific, highly aggressive, or uniquely tuned exhaust note might find the MagnaFlow Street Series to be somewhat generic in comparison. This system is best suited for those who desire a solid, reliable exhaust upgrade that offers a pleasant, enhanced sound without being overly boisterous or introducing significant drone, making it a dependable choice for a daily driver.
- Provides a smooth, deep, and moderate exhaust tone.
- Constructed entirely from stainless steel for corrosion resistance.
- Designed for a balanced sound improvement suitable for daily driving.
Pros: Good balance of sound and cabin comfort; Durable, all-stainless steel construction; Reputable brand with consistent quality
Cons: Sound can be less distinctive or exciting than specialized systems; Volume may be too moderate for some performance enthusiasts
Frequently Asked Questions
What is the difference between an axle-back and a cat-back exhaust?
In our research, we found that an axle-back exhaust replaces the muffler and exhaust tips, offering a relatively simple sound upgrade and often easier installation. A cat-back exhaust, on the other hand, replaces everything from the catalytic converter back, including the mid-pipe, resonator, and muffler. This typically results in a more significant change in sound, exhaust flow, and potential performance gains.
Will an aftermarket exhaust increase my Subaru's horsepower?
Based on manufacturer specifications and dyno tests we’ve reviewed, most aftermarket cat-back exhaust systems can offer modest horsepower and torque gains, typically in the range of 5-15 horsepower, by improving exhaust gas flow. Axle-back systems, due to their more limited scope, usually provide minimal to no measurable power increase, focusing primarily on sound enhancement. Significant power gains often require a combination of exhaust, tuning, and other performance modifications.
Do all aftermarket Subaru exhausts cause drone?
Our evaluation indicates that drone, an undesirable low-frequency hum in the cabin, can be a common characteristic of many aftermarket exhausts, especially those designed for aggressive sound or maximum flow. However, not all exhausts cause significant drone. Systems like the Borla S-Type or Corsa Sport, which incorporate specific resonator designs or patented sound cancellation technologies, are engineered to minimize or eliminate drone at cruising speeds, a factor we heavily weigh in our comparisons.
Are aftermarket exhausts legal for street use?
According to our research into industry standards and regulations, the legality of aftermarket exhausts for street use varies significantly by state and local jurisdiction. Many areas have noise ordinances that limit exhaust decibel levels, and some also have regulations regarding emissions equipment. While most cat-back systems are designed to be emissions-compliant, extreme or muffler-delete systems may exceed noise limits. It is crucial to check local laws before installing an aftermarket exhaust to ensure compliance.
How difficult is it to install an aftermarket exhaust on a Subaru?
Based on aggregated owner feedback and typical installation guides, the difficulty of installing an aftermarket exhaust on a Subaru can range from moderate to relatively easy, depending on the type of system. Axle-back systems are generally the simplest, often requiring only basic hand tools and an hour or two. Cat-back systems are more involved, requiring access under the vehicle and potentially more time, but are still often considered a manageable DIY project for someone with mechanical aptitude. Professional installation is always an option for those less comfortable with the process.
Our Verdict
After extensive research and comparison, the Invidia R400 Cat-Back Exhaust stands out as our top pick for its aggressive sound profile and robust construction, offering a truly commanding auditory experience for Subaru enthusiasts. For those seeking a more refined, drone-free experience with excellent build quality, the Borla S-Type Cat-Back Exhaust is our recommended runner-up, providing a sophisticated sporty note without sacrificing cabin comfort.
