Choosing the right cat back exhaust for your Audi S3 can dramatically impact your vehicle’s sound, performance, and appearance. For 2026, the market offers a range of options—from high-performance track editions to sleek, aesthetic upgrades. Among the top contenders are the AWE 2015-2020 Audi 8V S3 Track Edition Exhaust, known for its substantial power gains and durability; the APR CBK0003 Exhaust, praised for its polished look and sound-absorption mufflers; and the MagnaFlow 19390, which appeals to those seeking a lightweight, racing-inspired tone. Each has distinct advantages and tradeoffs, making it essential to match your priorities—whether it’s maximum horsepower, sound profile, or installation ease.
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Key Takeaways
- The AWE Track Edition offers the highest performance boost but comes at a premium price.
- APR‘s system provides a balanced blend of aesthetic appeal and sound control, suitable for daily drivers.
- MagnaFlow emphasizes a racing sound and lightweight design, ideal for performance enthusiasts.
- MBRP and BORLA systems focus on style and throttle response but might be louder or more model-specific.
- Compatibility and installation complexity vary, so matching the product to your skill level and vehicle specs is key.
| AWE 2015-2020 Audi 8V S3 Track Edition Exhaust with 102mm Black Tips |  | Best Overall Performance and Durability | Compatibility: Audi 8V S3 (2015-2020) | Tips: 102mm Black Tips | Material: T304 Stainless Steel | VIEW ON AMAZON | See Our Full Breakdown |
| APR CBK0003 Exhaust – Catback System for S3 8V |  | Best for Aesthetics and Sound Control | Material: T304 stainless steel | Construction: Argon-back-purged TIG welding | Tubing: Single 3″ to quad 2.5″ mandrel-bent | VIEW ON AMAZON | See Our Full Breakdown |
| BORLA 140631 Cat-Back Performance Exhaust System for 2015-2020 Audi 8V S3 2.0L 4 Cyl Turbo |  | Best Classic Sound and Easy Installation | Material: T-304 Stainless Steel | Installation: Bolt-on | Construction: All Welded | VIEW ON AMAZON | See Our Full Breakdown |
| MBRP 15-18 Audi S3 SS 3in Quad Split Rear Exit with Carbon Fiber Tips – T304 |  | Best for Style and Throttle Response | Material: 304 Stainless Steel | Tubing Diameter: 3 inch | Tip Diameter: 4 inch | VIEW ON AMAZON | See Our Full Breakdown |
| MagnaFlow Performance Cat-Back Exhaust System Kit 19390 |  | Best for Racing Sound and Track Use | Model: 19390 | Vehicle Fitment: 2018-2019 Audi A5 Sportback | Material: Machined | VIEW ON AMAZON | See Our Full Breakdown |
| cat back exhaust for audi s3 | Material |
|---|---|
| AWE 2015-2020 Audi 8V S3 Track | T304 Stainless Steel |
| APR CBK0003 Exhaust | T304 stainless steel |
| BORLA 140631 Cat-Back Performa | T-304 Stainless Steel |
| MBRP 15-18 Audi S3 SS 3in Quad | 304 Stainless Steel |
| MagnaFlow Performance Cat-Back | Machined |
More Details on Our Top Picks
AWE 2015-2020 Audi 8V S3 Track Edition Exhaust with 102mm Black Tips
This system shines for those seeking maximum horsepower and a durable build, thanks to its T304 stainless steel construction and a performance boost of 17 HP and 23 ft-lbs torque. Its design is tailored specifically to the 8V S3, offering a perfect fit with no check engine light issues—an advantage over some universal systems. Compared with others, its main downside is the higher price point, which may deter budget-conscious buyers, but the quality and performance justify the investment for enthusiasts focused on long-term reliability and power gains.
Pros:- Increases horsepower and torque significantly
- Made from durable T304 stainless steel
- No check engine light issues
Cons:- Designed specifically for certain models, limiting compatibility
- Higher price compared to other options
Best for: Performance-focused owners who want maximum power and durability.
Not ideal for: Budget shoppers or those seeking a universal fit for different models.
- Compatibility:Audi 8V S3 (2015-2020)
- Tips:102mm Black Tips
- Material:T304 Stainless Steel
- Performance Boost:17 HP and 23 ft-lbs Torque
Our verdict“This pick is best for enthusiasts prioritizing performance and durability over cost.”
APR CBK0003 Exhaust – Catback System for S3 8V
The APR system offers a sleek, polished appearance with advanced craftsmanship, including argon-back-purged TIG welding. Its mandrel-bent tubing maximizes airflow, and features like sound-absorption mufflers and a Helmholtz resonator help manage sound levels—making it a versatile choice for those who want performance without excessive noise. Compared to the AWE system, it might require professional installation and could be louder for some, but its OEM-style slip clamps make it easier to install for DIYers comfortable with moderate upgrades.
Pros:- High-quality stainless steel construction
- Mandrel-bent tubing for optimal airflow
- Sleek polished tips
Cons:- May require professional installation
- Potentially louder than stock for some users
Best for: Owners seeking a refined sound and aesthetic upgrade with reliable fitment.
Not ideal for: Those seeking maximum horsepower gains or a more aggressive sound profile.
- Material:T304 stainless steel
- Construction:Argon-back-purged TIG welding
- Tubing:Single 3″ to quad 2.5″ mandrel-bent
- Tips:Polished 4″ slash-cut
Our verdict“Ideal for drivers who want a balanced upgrade with aesthetic appeal and moderate sound levels.”
BORLA 140631 Cat-Back Performance Exhaust System for 2015-2020 Audi 8V S3 2.0L 4 Cyl Turbo
Designed for those who appreciate a traditional, powerful exhaust note, the BORLA system offers a classic sound signature backed by all-welded T-304 stainless steel construction. Its bolt-on design simplifies installation, especially for DIY enthusiasts. However, since it’s tailored specifically for 8V S3 models with 2.0L turbo engines, compatibility limitations exist. It’s a straightforward upgrade that prioritizes sound and durability but may lack the performance gains of more aggressive systems.
Pros:- Durable T-304 stainless steel
- Easy bolt-on installation
- Powerful, classic exhaust sound
Cons:- Limited to specific models
- Performance metrics are not detailed
Best for: Drivers valuing sound quality and durability with an easy upgrade process.
Not ideal for: Those chasing maximum horsepower or a more aggressive tone.
- Material:T-304 Stainless Steel
- Installation:Bolt-on
- Construction:All Welded
- Application:2015-2020 Audi 8V S3 2.0L Turbo
Our verdict“A solid choice for owners seeking a reliable, traditional performance exhaust with straightforward installation.”
MBRP 15-18 Audi S3 SS 3in Quad Split Rear Exit with Carbon Fiber Tips – T304
The MBRP system is tailored for the 2015-2018 S3, emphasizing style and throttle response with 3-inch mandrel-bent tubing and a striking quad split rear exit. The 4-inch carbon fiber tips add a premium look, and the system’s design improves exhaust flow, enhancing throttle responsiveness. Its limited 30-day warranty and specific model focus mean it’s best suited for owners who want a quick aesthetic and performance upgrade but are prepared for a short warranty period and potential loudness.
Pros:- Improves throttle response
- Stylish carbon fiber tips
- Mandrel-bent tubing for better airflow
Cons:- Limited warranty of only 30 days
- Designed for specific model years
Best for: Style-conscious owners who want improved throttle response and a modern look.
Not ideal for: Those seeking long-term warranty coverage or universal compatibility.
- Material:304 Stainless Steel
- Tubing Diameter:3 inch
- Tip Diameter:4 inch
- Exit:Quad Split Rear
Our verdict“This system is best for owners prioritizing style and quick throttle improvements over warranty longevity.”
MagnaFlow Performance Cat-Back Exhaust System Kit 19390
The MagnaFlow 19390 offers a racing-inspired sound, making it ideal for track day enthusiasts. Its lightweight design improves handling, and its dyno-tested performance gains ensure a noticeable power boost. The system is a direct fit and easy to install, with a limited lifetime warranty providing peace of mind. That said, its specific fitment for 2018-2019 Audi A5 Sportback and the 45-pound weight might be disadvantages for those seeking a more universal or lightweight setup for daily driving.
Pros:- Racing-inspired exhaust tone
- Lightweight, track-ready design
- Limited lifetime warranty
Cons:- Designed mainly for specific models
- Heavyweight at 45 pounds
Best for: Performance purists who want a loud, aggressive sound and track-ready performance.
Not ideal for: Casual drivers or those concerned about weight and noise levels.
- Model:19390
- Vehicle Fitment:2018-2019 Audi A5 Sportback
- Material:Machined
- Warranty:Limited lifetime
Our verdict“Best suited for drivers focused on aggressive sound and maximum performance on the track or at high speeds.”
How We Picked
Our selection process focused on exhaust systems designed specifically for the Audi S3 (2015-2020), prioritizing quality materials like T304 stainless steel, proven performance gains, ease of installation, and customer reviews. We compared sound profiles, durability, and warranty coverage, aiming to identify options that balance performance, aesthetics, and value. Each product was evaluated for its fit on the S3, potential for check engine light issues, and overall reputation among enthusiasts.
Factors to Consider When Choosing Cat Back Exhaust For Audi S3
Selecting the right cat back exhaust for your Audi S3 involves balancing performance, sound, installation complexity, and budget. Understanding your priorities and the specific features of each system will help you make an informed decision that enhances your driving experience.Performance vs. Sound
If maximum horsepower is your goal, systems like the AWE Track Edition provide significant gains with durable construction. For a more refined sound that balances daily drivability, APR offers a quieter, more polished experience. Racing-inspired options like MagnaFlow prioritize loud, aggressive tones that are best suited for track use.
Material and Build Quality
Look for systems made from T304 stainless steel, which ensures longevity and resistance to corrosion. Mandrel-bent tubing maximizes airflow efficiency, translating into better performance. Cheaper materials may save money upfront but could lead to quicker degradation.
Installation and Compatibility
Some systems feature bolt-on designs that are straightforward for experienced DIYers, while others might require professional installation. Always double-check compatibility with your model year to avoid fitment issues, especially with model-specific systems like BORLA or MBRP.
Warranty and Cost
Higher-priced systems often come with longer warranties and better materials, but budget options can still offer good performance. Short-term warranties, like MBRP’s 30-day coverage, should be weighed carefully against your expectations for durability and long-term use.
Frequently Asked Questions
Will installing a cat back exhaust improve my Audi S3’s performance?
Yes, most aftermarket cat back exhaust systems are designed to improve exhaust flow, which can lead to gains in horsepower and torque, especially when paired with other performance modifications. However, the extent of these gains varies based on the system and your vehicle’s current setup.
Is professional installation required for these exhaust systems?
While some systems, like APR or BORLA, are designed for direct bolt-on installation that can be handled by experienced DIYers, others—particularly those with complex piping or requiring custom fitting—may benefit from professional installation to ensure proper fit and optimal performance.
How loud will my exhaust be after installation?
The sound level depends on the system’s design and sound-absorbing features. Systems like MagnaFlow or MBRP tend to produce louder, more aggressive sounds, while APR and BORLA aim for a more refined or moderate tone. Consider your preference and local noise regulations before choosing.
Will these exhaust systems affect my car’s warranty or check engine light?
High-quality systems like AWE generally guarantee no check engine light issues and may not void your warranty if they meet certain standards. However, cheaper or universal systems might cause warning lights or compatibility problems; always check manufacturer claims and consult a professional if unsure.
Are these exhaust systems compatible with other modifications?
Most systems are compatible with basic modifications, but extensive tuning or other performance upgrades can influence effectiveness. Always verify compatibility with your specific vehicle configuration and consider consulting a specialist for optimal results.
Conclusion
For enthusiasts seeking maximum power and durability, the AWE Track Edition makes the most sense. Owners prioritizing aesthetic upgrades and sound control will find the APR System ideal. Performance purists and track-day drivers should consider the MagnaFlow for its aggressive tone and lightweight design. Meanwhile, those looking for a straightforward, reliable upgrade with good sound might prefer the BORLA. Budget-conscious buyers should weigh the benefits of each system against their specific needs and installation comfort level.
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