Choosing the right cat-back exhaust system for your Audi S4 can significantly impact its sound, performance, and overall driving experience. Among the leading options, the Borla 140052 Cat-Back Exhaust System stands out for its premium stainless steel construction and distinctive tone, though it comes at a higher price point. The BORLA 140682 offers a more straightforward bolt-on fit with a dual split rear exit and a no-drone guarantee, making it a great choice for enthusiasts seeking a balance of sound and durability. Meanwhile, the Borla 140851 provides a simpler single outlet setup that’s easy to install and enhances performance, but it might lack the aggressive sound some drivers crave. Each option carries its own tradeoffs, from cost to sound profile, so understanding your priorities is key to choosing the best fit for your Audi S4.
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Key Takeaways
- The Borla 140052 excels in durability and distinctive sound, but demands a higher investment.
- The BORLA 140682 offers a dual exit design with a no-drone guarantee, ideal for daily drivers seeking refined performance.
- The Borla 140851 simplifies installation with a single outlet and muffler, making it suitable for those prioritizing ease of upgrade.
- All options are made of stainless steel, ensuring longevity, but noise levels and installation complexity vary.
- Price and sound customization are primary factors influencing the best choice depending on user priorities.
| Borla 140052 Cat-Back Exhaust System |  | Best Overall for Durability and Power | Brand: Borla | Model Number: 140052 | Material: T-304 stainless steel | VIEW LATEST PRICE | See Our Full Breakdown |
| BORLA 140682 Cat-Back Performance Exhaust System for 2014-2020 Audi Quattro 4 Cyl. T-304 Stainless Steel S-Type Sound Dual Split Rear Exit 3.5″ Round Polished Tips |  | Best for Balanced Sound and Durability | Material: T-304 Stainless Steel | Installation: Bolt-on | Construction: All welded | VIEW LATEST PRICE | See Our Full Breakdown |
| Borla 140851 Cat Back Exhaust System |  | Best for Easy Installation and Performance | Exhaust Type: Cat Back | Material: Stainless Steel | Muffler Included: Yes | VIEW LATEST PRICE | See Our Full Breakdown |
| Borla 140914 Exhaust System |  | Best for Fuel Economy and Throaty Sound | VIEW LATEST PRICE | See Our Full Breakdown |
| cat-back exhaust systems for Audi S4 | Material |
|---|---|
| Borla 140052 Cat-Back Exhaust | T-304 stainless steel |
| BORLA 140682 Cat-Back Performa | T-304 Stainless Steel |
| Borla 140851 Cat Back Exhaust | Stainless Steel |
| Borla 140914 Exhaust System | — |
More Details on Our Top Picks
Borla 140052 Cat-Back Exhaust System
The Borla 140052 stands out for its high-quality T-304 stainless steel construction, promising excellent corrosion resistance and long-lasting performance. Compared with other options, it offers a notable boost in power and torque, making it suitable for enthusiasts who want a true performance upgrade. Its distinctive, deep exhaust note adds a sporty character to the S4, although this may be a drawback for those preferring a quieter ride. The main tradeoff is cost—this system is priced at the higher end, and installation might require professional help. Nevertheless, if durability and sound are your top priorities, this pick delivers.
Pros:- Made of durable, corrosion-resistant stainless steel
- Improves engine power and torque
- Produces a distinctive, powerful exhaust sound
- Built to last under extreme conditions
Cons:- High-performance exhaust systems can be expensive
- Installation may require professional help
- May increase noise levels beyond stock exhaust
Best for: Drivers seeking maximum durability and performance enhancement with a signature sound.
Not ideal for: Those on a strict budget or looking for a subtle, OEM-like sound.
- Brand:Borla
- Model Number:140052
- Material:T-304 stainless steel
- Type:Catback exhaust system
- Included Components:Exhaust system
- Warranty:Manufacturer warranty
Our verdict“The Borla 140052 offers unmatched durability and performance, making it the best overall choice for serious enthusiasts willing to invest in quality.”
BORLA 140682 Cat-Back Performance Exhaust System for 2014-2020 Audi Quattro 4 Cyl. T-304 Stainless Steel S-Type Sound Dual Split Rear Exit 3.5″ Round Polished Tips
The BORLA 140682 is tailored for 2014-2020 Audi Quattro 4-cylinder models, featuring all-welded T-304 stainless steel construction that ensures durability. Its dual split rear exit and 3.5″ polished tips give a refined, sporty appearance and a richer exhaust note. Unlike some systems that drone at highway speeds, this one offers a no-drone guarantee, making it well-suited for daily use. Compared to the Borla 140052, it’s easier to install and provides a more balanced sound profile, although some users report that it can significantly increase exhaust noise, which could be a drawback for quiet ride aficionados.
Pros:- Durable T-304 stainless steel construction
- Enhanced exhaust sound with dual split rear exit
- All-welded for strength and durability
- Made in USA
Cons:- Installation may require some mechanical skill
- May increase exhaust noise significantly
Best for: Daily drivers wanting a durable, well-balanced exhaust with an aggressive edge.
Not ideal for: Owners seeking a very subtle or OEM-like exhaust tone.
- Material:T-304 Stainless Steel
- Installation:Bolt-on
- Construction:All welded
- Fitment:2014-2020 Audi Quattro 4 Cyl.
- Tips:3.5″ Round Polished
- Exit:Dual Split Rear
Our verdict“This system balances durability and sound enhancement, making it ideal for drivers who want a robust upgrade with a sporty tone.”
Borla 140851 Cat Back Exhaust System
The Borla 140851 features a simple, single outlet design with a 3.5-inch pipe diameter, making it easier to install than more complex systems. Its stainless steel construction ensures durability, and it includes a muffler to improve sound quality and performance. Compared with dual exit setups, this option is more straightforward, but it may lack the aggressive exhaust note some enthusiasts desire. It’s a solid choice for someone looking for a straightforward upgrade that still provides noticeable performance benefits, though it might not satisfy those wanting a louder, more distinct sound.
Pros:- Durable stainless steel construction
- Includes muffler for better sound and performance
- Easy to install with a single outlet design
- Reliable upgrade for everyday use
Cons:- Limited to vehicles compatible with this specific system
- No detailed sound or performance data provided
Best for: DIY enthusiasts or those seeking an easy, reliable upgrade without complex modifications.
Not ideal for: Drivers craving a highly aggressive exhaust tone or dual outlet aesthetics.
- Exhaust Type:Cat Back
- Material:Stainless Steel
- Muffler Included:Yes
- Number of Outlets:Single
- Pipe Diameter:3.5 in
Our verdict“The Borla 140851 provides a hassle-free upgrade with solid durability and performance, ideal for those prioritizing ease of installation.”
Borla 140914 Exhaust System
The Borla 140914 offers a performance-oriented exhaust designed to improve both power and fuel economy. Crafted from durable austenitic stainless steel, it’s built for longevity and tailored for specific applications. Its throaty, aggressive sound appeals to drivers seeking a more commanding presence on the road, yet details about installation and compatibility are limited. This system excels in providing a balance of performance and efficiency but may require careful verification for fitment.
Pros:- Improves exhaust flow for better performance
- Enhances fuel economy at cruising speeds
- Produces a throaty, performance tone
- Durable austenitic stainless steel construction
Cons:- No specific installation details provided
- Limited information on compatibility
Best for: Owners looking for a combination of improved fuel economy and a deep, aggressive exhaust tone.
Not ideal for: Those wanting a straightforward, plug-and-play upgrade with detailed installation instructions.
Our verdict“This exhaust system suits drivers prioritizing efficiency combined with a powerful sound, though verification of fitment is recommended.”
How We Picked
Our selection process focused on exhaust systems that are specifically designed or compatible with the Audi S4, prioritizing durability, performance gains, sound quality, and ease of installation. We compared construction materials, customer reviews, and manufacturer specifications, emphasizing systems made from high-quality stainless steel to resist corrosion. We also evaluated sound profiles, from subtle enhancements to aggressive tones, and considered the tradeoffs involved—such as increased noise levels or installation difficulty—to match different driver needs. Our goal was to highlight options that offer real performance improvements without compromising reliability, providing a clear choice for various budgets and preferences.
| cat-back exhaust systems for Audi S4 | Material |
|---|---|
| Borla 140052 Cat-Back Exhaust | T-304 stainless steel |
| BORLA 140682 Cat-Back Performa | T-304 Stainless Steel |
| Borla 140851 Cat Back Exhaust | Stainless Steel |
| Borla 140914 Exhaust System | — |
Factors to Consider When Choosing Best Cat-back Exhaust Systems For Audi S4
When selecting an exhaust system for your Audi S4, it’s essential to balance factors like sound preference, installation complexity, durability, and budget. The right system can enhance your vehicle’s performance and give it a more aggressive or refined tone, depending on your taste. Consider whether you want a simple bolt-on upgrade, a system with dual outlets, or something that emphasizes sound over cost. Getting these details right ensures your investment aligns with your driving style and expectations.Performance and Sound
The primary reasons to upgrade are performance gains and sound enhancement. Systems made from high-quality stainless steel tend to last longer and resist corrosion, which is crucial for maintaining performance over time. If you want a deep, aggressive tone, look for systems with dual exits or larger pipes. For a subtler, refined sound, single outlet options or systems with mufflers can deliver a smoother tone without excessive noise.
Installation and Compatibility
Ease of installation varies widely. Bolt-on systems are generally straightforward for DIY enthusiasts, but some may still require basic mechanical skills. Always verify compatibility with your specific Audi S4 model year. Some systems are designed for particular engine types or configurations, so reading the product details carefully can prevent fitting issues and ensure you get the performance benefits you desire.
Durability and Materials
Stainless steel is the standard for durability, especially T-304 or austenitic types, which resist rust and corrosion. Cheaper materials may degrade faster, leading to leaks or reduced performance. Investing in a well-built system can save money in the long run, despite the higher initial cost. Consider warranty coverage and manufacturer reputation as additional indicators of quality.
Price and Value
High-end systems tend to cost more but often provide better materials, sound, and performance gains. Conversely, more affordable options may lack longevity or have a louder, less refined tone. Weigh your priorities—if performance and longevity are paramount, a higher price may be justified. For casual drivers, a more budget-friendly system could suffice, especially if ease of installation is a priority.
Frequently Asked Questions
Will upgrading my exhaust system improve my Audi S4’s performance?
Yes, a well-chosen cat-back exhaust can improve airflow, reduce backpressure, and enhance horsepower and torque. While the gains might be modest on a stock engine, combined with other upgrades, it can make a noticeable difference in throttle response and overall driving dynamics. Always select a system designed for your specific model to maximize benefits.
How loud will my new exhaust be compared to stock?
The sound level depends on the design—systems with dual exits and larger pipes tend to produce louder, more aggressive tones, while single outlet systems or those with mufflers tend to be quieter. Consider your noise tolerance and local regulations. Some systems also include sound dampening features to help keep noise within acceptable limits.
Is professional installation necessary?
While some bolt-on systems can be installed by experienced DIYers with basic tools, many recommend professional help to ensure proper fitment, sealing, and to avoid potential damage. Incorrect installation can lead to leaks, increased noise, or reduced performance, so weigh your mechanical skills carefully before attempting installation yourself.
Will an aftermarket exhaust void my warranty?
It depends on your manufacturer and local laws. Generally, installing an aftermarket exhaust system can void parts of your warranty if it causes damage or is not compliant with emissions standards. However, many systems are designed to be emissions-legal and may not affect warranty coverage. Always check your warranty terms and consider consulting your dealer before making modifications.
How do I choose the right exhaust system for my driving style?
Define whether you want maximum performance, a louder, sporty sound, or a more refined tone. Consider your budget, installation skills, and desired longevity. If you drive daily and prefer a quiet ride, systems with mufflers and single outlets are better. For performance-focused drivers seeking loudness and a sporty tone, dual exit systems with larger pipes are preferable.
Conclusion
If you prioritize durability, sound quality, and performance, the Borla 140052 is the clear choice, especially for enthusiasts willing to invest in a premium product. For daily drivers seeking a balance between sound and ease of installation, the BORLA 140682 offers a refined experience with proven durability. Those wanting a straightforward, budget-friendly upgrade should consider the Borla 140851, which simplifies installation without sacrificing reliability. Ultimately, your selection hinges on your specific goals—whether it’s maximum performance, a signature sound, or ease of use.
