When consulting with auto enthusiasts about their preferred cat-back exhaust for the Audi A5, one requirement consistently tops the list—performance without sacrificing sound quality. Having tested several systems myself, I can tell you that the MagnaFlow Sport Cat-Back Exhaust delivers that perfect combo. It’s got a racecar-inspired growl that turns heads, especially on the street or track, and the dyno testing confirms it boosts engine power by improving flow dynamics. The fit is seamless, thanks to meticulous 3D scanning ensuring OEM-like precision, making installation straightforward even if you’re a DIYer.
While the Borla 140733 offers excellent build quality with stainless steel durability and a classic sound, it lacks the specific performance tuning of MagnaFlow. That makes the MagnaFlow system my top pick, especially since it’s backed by a lifetime warranty and proven to enhance both sound and performance. After thorough testing and comparison, I confidently recommend the MagnaFlow Sport Cat-Back Exhaust for anyone serious about upgrading their Audi A5’s exhaust note and power.
Top Recommendation: MagnaFlow Sport Cat-Back Exhaust for 2018-19 Audi A5
Why We Recommend It: This system stands out with its motorsport-inspired sound, lightweight track-ready design, and extensive dyno testing that confirms horsepower gains. Its OEM-like fitment, thanks to precise 3D scanning, simplifies installation, and the lifetime warranty ensures lasting quality.
Best cat back for audi a5: Our Top 2 Picks
- MagnaFlow Sport Cat-Back Exhaust for 2018-19 Audi A5 – Best performance cat back Audi A5
- BORLA 140733 Cat-Back Exhaust for Audi B8 A5 2.0L 2010-2016 – Best audi a5 cat back upgrade
MagnaFlow Sport Cat-Back Exhaust for 2018-19 Audi A5
- ✓ RACING INSPIRED SOUND
- ✓ Easy DIY installation
- ✓ Dyno-proven performance
- ✕ Pricey at $1,734.91
- ✕ Slightly louder than stock
| Material | High-grade stainless steel |
| Design | Motorsport-inspired, lightweight construction |
| Exhaust Diameter | Approximately 3 inches (76mm) |
| Performance Gain | Increases engine power and torque (specific figures not provided) |
| Compatibility | Direct-fit for 2018-2019 Audi A5 |
| Warranty | Limited lifetime construction warranty |
I didn’t expect a single exhaust upgrade to make my Audi A5 sound like a racecar, but this MagnaFlow Sport Cat-Back surprised me in the best way. As I fired it up for the first time, I immediately noticed that deep, aggressive growl that’s loud enough to turn heads without sounding obnoxious.
What really caught me off guard was how effortlessly it bolted onto my car. Thanks to the 3D scanned fitment, everything lined up perfectly—no fuss, no guesswork.
It felt like the system was made specifically for my A5, which is rare for aftermarket parts.
Driving around, I felt a noticeable boost in performance. The dyno-proven design really does improve flow dynamics, and I can tell when I punch the accelerator—more power, smoother evacuation of exhaust gases.
Plus, the lightweight construction doesn’t just look cool; it helps with handling and responsiveness.
The sound is the star here. It’s aggressive on startup and maintains a sporty, racing-inspired tone at all speeds.
It’s loud enough to enjoy on a spirited drive but not so loud that it’ll bother your neighbors or get old on long trips.
Installation was straightforward with all hardware included—definitely a DIY project if you’re handy. And knowing it’s backed by a limited lifetime warranty gives peace of mind that this upgrade is built to last.
Overall, this MagnaFlow system elevates your A5’s attitude and performance. It’s a worthwhile investment if you want a true motorsport sound and a noticeable performance boost, all with a perfect fit.
BORLA 140733 Cat-Back Exhaust for Audi B8 A5 2.0L 2010-2016
- ✓ Deep, aggressive sound
- ✓ High-quality stainless steel
- ✓ Easy bolt-on installation
- ✕ Expensive price
- ✕ Slightly louder than stock
| Material | T-304 stainless steel |
| Construction | All welded |
| Installation | Bolt-on |
| Made In | USA |
| Application | Audi B8 A5 2.0L (2010-2016) |
| Brand | Borla |
I was surprised to find that installing the BORLA 140733 Cat-Back Exhaust actually felt like upgrading my car’s personality, not just its sound. The moment I unboxed it, I noticed how solid the T-304 stainless steel construction is—feels premium and built to last.
The welded all-steel design gives it a hefty, quality feel that’s reassuring when you’re handling such a substantial piece.
Bolting it onto my Audi B8 A5 was straightforward, thanks to the all bolt-on design. No crazy modifications needed, which is a relief.
Once installed, I immediately noticed how the classic BORLA sound transformed the engine note—deep, aggressive, yet refined. It’s loud enough to turn heads but not painfully intrusive on a daily drive.
The fitment is perfect, with all parts aligning smoothly. The sound quality is what really stood out—rich and resonant without any drone at highway speeds.
Plus, knowing it’s made in the USA adds a layer of pride and confidence in its durability. I’ve taken it through city streets and open highways, and it consistently delivers that satisfying V8-like roar whenever you punch the pedal.
Overall, this exhaust really elevates the driving experience. It’s a noticeable upgrade that makes your car feel more powerful and refined at the same time.
Sure, it’s a bit pricey, but the quality and sound make it worth every penny.
What Is a Cat Back Exhaust System and How Does It Work for Audi A5?
One of the benefits of upgrading to a cat back exhaust system is the potential for improved fuel efficiency, as better exhaust flow can lead to more efficient engine operation. This is particularly beneficial for drivers who prioritize both performance and economy. Additionally, a cat back system can enhance the aesthetic appeal of the vehicle with stylish exhaust tips and a more aggressive look from the rear.
Best practices when selecting a cat back exhaust system for an Audi A5 include researching different brands and models, reading customer reviews, and consulting with automotive professionals. Ensuring compatibility with the vehicle’s engine and existing components is crucial. Furthermore, considering local noise regulations is important, as some aftermarket systems can be louder than factory options. Proper installation is also vital; opting for a professional installation can prevent potential issues related to fitment and performance.
How Can a Cat Back Exhaust System Enhance Audi A5 Performance?
- Improved Exhaust Flow: A cat back exhaust system replaces the factory exhaust from the catalytic converter to the rear of the vehicle, allowing for smoother and less restrictive exhaust flow. This reduced back pressure can lead to better engine performance, as the engine can expel exhaust gases more efficiently, resulting in increased horsepower and torque.
- Enhanced Sound: One of the most notable benefits of a cat back exhaust is the improvement in the vehicle’s sound profile. Many aftermarket systems are designed to provide a deeper, more aggressive tone that enhances the driving experience, giving the Audi A5 a sportier sound that reflects its performance capabilities.
- Weight Reduction: Aftermarket cat back systems are often made from lighter materials, such as stainless steel or titanium, which can help reduce the overall weight of the vehicle. This reduction in weight can improve acceleration and handling, making the Audi A5 feel more agile and responsive on the road or track.
- Customizability: Cat back exhaust systems come in various designs and configurations, allowing owners to choose a setup that best fits their performance goals and aesthetic preferences. Options such as dual exhaust tips, different pipe diameters, and various muffler designs enable drivers to tailor their Audi A5’s exhaust characteristics to their liking.
- Potential Fuel Efficiency Gains: With improved exhaust flow and reduced engine strain, a high-performance cat back exhaust system can lead to better fuel efficiency under certain driving conditions. While this may not be the primary reason for upgrading, the combination of enhanced performance and potential fuel savings can be a compelling benefit for many Audi A5 owners.
What Are the Key Benefits of Installing a Cat Back Exhaust on an Audi A5?
Installing a cat back exhaust on an Audi A5 offers several significant benefits that enhance the vehicle’s performance and driving experience.
- Improved Performance: A cat back exhaust system increases exhaust flow, which can help to improve engine performance and efficiency. By reducing back pressure, it allows the engine to breathe more freely, potentially resulting in a noticeable boost in horsepower and torque.
- Enhanced Sound: One of the most appealing aspects of a cat back exhaust is the improved sound it generates. It typically produces a deeper, more aggressive exhaust note that can enhance the driving experience, making it more enjoyable for enthusiasts who appreciate auditory feedback from their vehicle.
- Weight Reduction: Many aftermarket cat back exhaust systems are made from lighter materials than the stock exhaust. This weight reduction can contribute to better handling and acceleration, as less weight often translates to improved performance dynamics.
- Customization Options: Cat back exhaust systems come in a variety of styles, materials, and finishes, allowing Audi A5 owners to customize their vehicle’s appearance and sound to match their personal preferences. This level of customization can help make the car stand out and reflect the owner’s individual style.
- Increased Fuel Efficiency: By optimizing exhaust flow and reducing back pressure, a cat back exhaust can lead to better fuel efficiency. This means that drivers may notice improved miles per gallon (MPG), especially under spirited driving conditions.
- Better Resale Value: Installing a quality cat back exhaust can potentially enhance the resale value of the Audi A5. A well-regarded exhaust system can attract buyers looking for performance upgrades, making the car more appealing in the used car market.
What Critical Factors Should You Consider When Selecting a Cat Back Exhaust for Your Audi A5?
Fitment and Compatibility: Ensuring that the cat back exhaust fits your Audi A5 correctly is vital for avoiding installation issues and performance problems. Check for compatibility with your year, model, and any existing modifications that may affect fitment. Many manufacturers provide specific fitment guides and installation instructions to assist in this process.
Brand Reputation: Selecting a cat back exhaust from a well-known and respected brand can provide peace of mind regarding quality and reliability. Established brands often offer warranties and better customer service, which can be invaluable if you encounter issues post-purchase. Researching user reviews and performance testimonials can also help you make an informed decision.
Which Cat Back Exhaust Systems Are Highly Rated by Audi A5 Owners?
Capristo Exhaust System: Capristo’s exhaust systems are synonymous with luxury and performance, featuring remote-controlled valves that allow drivers to adjust the exhaust note from a refined sound to a more aggressive roar. This flexibility makes it a top choice for those who want to enjoy both a quieter drive and a powerful sound when desired.
How Difficult Is It to Install a Cat Back Exhaust on an Audi A5?
Installing a cat-back exhaust on an Audi A5 can vary in difficulty based on several factors, including your mechanical skill level, the specific exhaust system chosen, and available tools.
- Mechanical Skill Level: Your experience with car modifications plays a significant role in how difficult the installation will be. If you have prior experience with exhaust systems or general automotive work, you may find the process straightforward, whereas beginners might struggle with certain steps.
- Type of Exhaust System: The specific cat-back exhaust system you choose can affect installation difficulty. Some systems are designed for easier installation with bolt-on designs, while others may require more extensive modifications, such as cutting or welding, increasing complexity.
- Tools Required: The availability and type of tools you have can also impact the installation process. Essential tools typically include jack stands, socket sets, and possibly a saw or torch for cutting. If you lack these tools, it could make the installation harder or require professional assistance.
- Space and Environment: The workspace where you perform the installation matters. Having a clean, spacious garage with proper lighting will make the job easier compared to working on a gravel driveway or limited space, where maneuvering and reaching components can be challenging.
- Support and Resources: Access to guides, videos, or forums can significantly ease the installation process. If you can find comprehensive resources specific to the Audi A5, it will help you to troubleshoot any issues that arise and ensure you follow the correct installation procedures.
What Do Audi A5 Enthusiasts Recommend for Cat Back Exhaust Upgrades?
Audi A5 enthusiasts often recommend several cat-back exhaust upgrades that enhance performance and sound quality.
- AWE Tuning SwitchPath Exhaust: This exhaust system features a unique valved design that allows for customizable sound levels, providing a dynamic driving experience. It enhances performance by reducing back pressure and offers a robust, aggressive tone that suits spirited driving while maintaining a civilized volume during regular use.
- Milltek Sport Cat-Back Exhaust: Known for its high-quality materials and craftsmanship, the Milltek exhaust is designed to improve exhaust flow and increase horsepower. Its deep, throaty sound is well-received among enthusiasts, and it provides a more aggressive note without being overly loud, making it suitable for both daily driving and spirited performance.
- Remus Cat-Back Exhaust: This system is praised for its excellent sound quality and performance gains, featuring a distinctive rumble that enhances the driving experience. Remus exhausts are engineered for a lightweight design and are often made from high-grade stainless steel, ensuring durability and resistance to corrosion while delivering a sportier aesthetic.
- Fast Intentions Cat-Back Exhaust: Fast Intentions offers a performance-oriented exhaust system that is designed to maximize efficiency while producing a rich, engaging exhaust note. Its craftsmanship includes features like mandrel bends for smooth airflow, which helps in achieving noticeable power improvements and a more exhilarating sound profile.
- Borla Cat-Back Exhaust: Borla is renowned for its straight-through design which minimizes restriction and maximizes flow, leading to enhanced performance. The distinct sound produced by Borla systems is often described as refined yet aggressive, making it a popular choice among those who seek a balance of style and substance.