When searching for the best cat-back exhaust systems for Audi S5, the goal is to balance performance, sound, and build quality. The AWE Tuning 3010-43030 Touring Edition stands out as the top overall choice thanks to its refined sound and premium materials. For those seeking a more aggressive tone, the AWE Tuning Track Edition offers a louder, more sporty experience, though it may sacrifice some daily comfort. Another noteworthy option is the BORLA S-Type, which delivers a deep, resonant exhaust note with excellent durability. Buyers often face a tradeoff between sound level, price, and installation complexity. Continue reading for a detailed breakdown of each system to find the best fit for your Audi S5.
Key Takeaways
- The top-ranked AWE Tuning Touring Edition offers a balanced mix of sound quality and build durability, making it ideal for daily drivers.
- The Track Editions provide louder, more aggressive exhaust notes but may be less suitable for regular commuting due to increased drone.
- Materials matter: T304 stainless steel and diamond black tips improve longevity and aesthetic appeal, especially in harsh climates.
- Price often correlates with sound customization and build quality, but premium options tend to offer better long-term value.
- Installation difficulty varies; systems with bolt-on designs generally simplify the upgrade for DIY enthusiasts.
More Details on Our Top Picks
AWE Tuning 3010-43030 Audi S5 Touring Edition Exhaust System (Diamond Black Tips 102mm 3.0T)
This Touring Edition exhaust stands out for its refined tone and premium build, making it the top choice for those who want a noticeable upgrade without excessive noise. Compared to the Track Edition, it offers a more balanced sound profile suitable for daily driving, while still providing a sporty presence. The 304 stainless steel tubing ensures durability, and the diamond black tips add a sleek look. However, it comes at a higher price point, and some may find the moderate sound less aggressive than other options. Still, this system provides a seamless upgrade for drivers who prioritize quality and subtlety over maximum volume.
Pros:- High-quality 304 stainless steel construction ensures longevity
- Balanced sound profile suitable for daily driving
- Sleek diamond black tips enhance visual appeal
- Excellent fit and finish
Cons:- Higher price compared to some alternatives
- Moderate sound may be too subtle for aggressive sound seekers
Best for: Audi S5 owners seeking a premium, well-balanced exhaust for daily use with refined aesthetics.
Not ideal for: Enthusiasts wanting the loudest possible sound or track-ready performance; they might prefer the Track Edition.
- Exhaust Type:Cat-Back
- Tubing Material:304 stainless steel
- Tip Quantity:4
- Tip Finish:Diamond Black
- Tip Outlet Diameter:4 inches
- Sound Level:Moderate
Bottom line: This exhaust is perfect for owners who want a premium, refined upgrade without excessive volume.
AWE Tuning Audi B8.5 S5 3.0T Touring Edition Exhaust System – Polished Silver Tips (102mm)
This Touring Edition system is engineered for smooth operation, offering a balanced sound that remains unobtrusive during cruising but roars under full throttle. Compared to the Diamond Black Tips version, the polished silver finish provides a more classic look, while the sound tuning makes it ideal for owners who want a refined experience without constant loudness. The system’s design helps eliminate rattling associated with factory downpipes, especially with the optional AWE Downpipe upgrade. Nonetheless, some users report rattling issues with stock downpipes, and the system’s moderate tone might disappoint those seeking maximum volume. It’s best suited for drivers who want performance without sacrificing refinement.
Pros:- Expertly crafted for durability and performance
- Smooth idling and cruising with minimal drone
- Eliminates rattling issues with factory downpipes
- Elegant polished silver tips
Cons:- Potential rattling if factory downpipes are used without modification
- Moderate sound may not satisfy those seeking loudness
Best for: Owners who want a polished, balanced exhaust system that emphasizes smoothness and quality for daily driving.
Not ideal for: Performance enthusiasts seeking maximum volume and aggressive sound; they may prefer the Track Edition or more aggressive setups.
- Exhaust Type:Cat-Back
- Tip Diameter:102mm
- Tip Finish:Polished Silver
- Sound Profile:Balanced, powerful under load
- Material:Steel
- Application:B8.5 S5 3.0T
Bottom line: Ideal for owners who prioritize refined sound and build quality over maximum volume.
AWE Tuning Audi B8 S5 4.2L Touring Edition Exhaust System – Polished Silver Tips – 3015-43028
This V8-specific Touring Edition offers a distinctive, deep exhaust note that appeals to traditional V8 enthusiasts. Compared with the 3.0T models, this system provides a more pronounced growl, with a solid steel construction and precision-formed tubing ensuring durability and a perfect fit. Its authentic AWE build and warranty make it a reliable upgrade. The main tradeoff is that this system is designed for 4.2L engines, so it isn’t compatible with the 3.0T models, limiting its use. For owners of the V8 version, this system delivers a premium sound and appearance, but it’s not suitable for those with the smaller engine.
Pros:- Authentic AWE tuning with manufacturer warranty
- Deep, aggressive V8 sound
- High-quality steel construction
- Precision-formed tubing for optimal fit
Cons:- Limited to V8 models; not compatible with 3.0T
- Higher cost due to specialized design
Best for: V8-powered Audi S5 owners wanting a deep, resonant exhaust sound with high-quality craftsmanship.
Not ideal for: Owners of 3.0T models or those seeking a more aggressive sound profile than the touring setup provides.
- Exhaust Type:Cat-Back
- Application:B8 S5 4.2L
- Tip Finish:Polished Silver
- Tip Diameter:102mm
- Material:Steel
- Sound Level:Deep, resonant
Bottom line: This exhaust is best for V8 owners seeking a premium, throaty tone with reliable quality.
AWE Tuning Audi B8 S5 4.2L Track Edition Exhaust System – Polished Silver Tips – 3020-42014
The Track Edition delivers an aggressive, high-performance exhaust setup designed for enthusiasts who want maximum volume and a sporty tone. It features precision-formed tubing and a direct-fit system that enhances power output and sound, surpassing the more subdued Touring models like the B8.5. Compared to the Touring Edition, this system sacrifices some everyday comfort for track-ready performance, with a louder, more visceral exhaust note. The main tradeoff is increased drone and noise levels, which can be intrusive on daily commutes. If loud, aggressive sound and maximum performance are your goals, this system checks all boxes but isn’t ideal for quiet or long-distance cruising.
Pros:- Maximum volume and aggressive tone
- Enhanced performance due to optimized flow
- Durable steel construction with precision tubing
- Authentic AWE quality with warranty
Cons:- High noise levels may be intrusive on daily drives
- Increased drone can cause discomfort during long trips
Best for: Performance-focused drivers who want a loud, aggressive exhaust for spirited driving or track days.
Not ideal for: Daily drivers or those sensitive to drone and high noise levels; this system is best suited for dedicated performance use.
- Exhaust Type:Cat-Back
- Tip Finish:Polished Silver
- Tip Diameter:102mm
- Application:B8 S5 4.2L
- Sound Level:Loud, aggressive
- Performance:Enhanced flow and power
Bottom line: This exhaust is perfect for those prioritizing maximum sound and performance over comfort and noise restrictions.
AWE Tuning Audi B8.5 S5 3.0T Touring Edition Exhaust System – Polished Silver Tips (90mm)
This Touring Edition features a smaller 90mm tip diameter, making it a sleek choice for owners who desire a subtle aesthetic boost. Compared to the larger 102mm tips, the 90mm version offers a more understated look but still provides a significant sound upgrade over stock without being overly loud. The polished silver tips complement the vehicle’s styling, and the precision-formed tubing ensures a good fit. The main tradeoff is that the smaller tips may produce a slightly less aggressive visual impact, and the sound profile remains moderate. This system is ideal for drivers wanting a discreet yet effective upgrade.
Pros:- Compact 90mm tips for a subtle look
- Excellent build quality with polished finish
- Balanced sound upgrade without excessive drone
- Perfect for daily drivers seeking elegance
Cons:- Less aggressive visual presence due to smaller tips
- Sound level may be too moderate for loudness seekers
Best for: Owners who prefer a less conspicuous appearance with a refined sound profile for everyday driving.
Not ideal for: Performance purists seeking maximum volume or a highly aggressive aesthetic; they might prefer larger tips or more aggressive systems.
- Exhaust Type:Cat-Back
- Tip Diameter:90mm
- Tip Finish:Polished Silver
- Application:B8.5 S5 3.0T
- Sound Level:Moderate
- Material:Steel
Bottom line: Ideal for owners who prioritize discreet visual appeal and a refined sound without sacrificing quality.
MBRP 18-21 Audi S5 Coupe/S4 Sedan T304 SS 2.5in Cat-Back Quad Rear Exit Exhaust – SS Tips
This MBRP exhaust stands out for delivering noticeable gains in torque and horsepower while maintaining a relatively straightforward bolt-on installation. Compared to the more refined sound of the BORLA system, this option is louder and has a more aggressive tone, which may not suit everyone. Its 304 stainless steel construction promises durability, but the louder cabin noise could be a drawback for daily drivers who prefer subtlety. The dual quad tips add a sporty aesthetic, making it a smart choice for those seeking performance without the premium price tag of the AWE Tuning system. However, this setup may produce more drone at highway speeds, which could become tiresome.
bestFor: Enthusiasts wanting a significant power boost and an aggressive sound on a budget.
notIdealFor: Drivers seeking a quieter, more refined exhaust for daily commuting or long-distance cruising.
- Pros: Noticeable torque and horsepower gains, durable 304 stainless steel, sporty quad rear exit tips, affordable price point
- Cons: Louder cabin noise, potential drone at highway speeds, less refined sound compared to premium systems
verdict: This pick makes the most sense for budget-conscious buyers seeking raw performance and a bold exhaust note.
specs: Material: 304 Stainless Steel, Tubing diameter: 2.5 in., Exit: Dual Rear, Tips: Quad SS, Fitment: 2018-2021 Audi S5 Coupe/S4 Sedan, Warranty: Manufacturer warranty
Pros:- Noticeable torque and horsepower gains
- Durable 304 stainless steel construction
- Sporty quad rear exit tips
- Cost-effective performance upgrade
Cons:- Louder cabin noise than desired for some
- Potential drone during highway driving
- Less refined sound compared to premium options
Best for: Enthusiasts wanting a significant power boost and an aggressive sound on a budget.
Not ideal for: Drivers seeking a quieter, more refined exhaust for daily commuting or long-distance cruising.
- Material:304 Stainless Steel
- Tubing diameter:2.5 in.
- Exit:Dual Rear
- Tips:Quad SS
- Fitment:2018-2021 Audi S5 Coupe/S4 Sedan
- Warranty:Manufacturer warranty
Bottom line: This pick makes the most sense for budget-conscious buyers seeking raw performance and a bold exhaust note.
AWE Tuning Audi B8 S5 4.2L Track Edition Exhaust System – Diamond Black Tips – 3020-43014
This AWE Tuning system is tailored for drivers who crave a race-inspired exhaust note with exceptional fitment and quality. Compared to the BORLA system, it offers a more aggressive, track-oriented sound that elevates the driving experience, especially with the optional pops and bangs upgrade. Its direct-fit design ensures easier installation, and the diamond black tips add a sleek, high-performance aesthetic. However, this premium build and sound come at a higher price, and the system’s louder tone may be too intense for everyday use. Additionally, it’s primarily designed for track or spirited driving, which might be overkill for casual owners.
bestFor: Track enthusiasts and drivers who prioritize aggressive sound and high-performance tuning.
notIdealFor: Daily drivers who prefer a more subdued, comfort-oriented exhaust setup.
- Pros: Exceptional sound with pops and bangs, high-quality steel construction, direct-fit for easy installation, aggressive track-ready tone
- Cons: Higher cost, louder in-cabin noise, potentially overbearing for daily driving
verdict: This option suits those seeking a race-inspired exhaust with premium quality and sound, and who are willing to pay for it.
specs: Material: Steel, Fitment: B8 S5 4.2L, Tips: Diamond Black, Type: Track Edition, Compatibility: Direct-fit, Warranty: Manufacturer warranty
Pros:- Exceptional track-ready sound
- High-quality steel construction
- Easy direct-fit installation
- Sleek diamond black tips
Cons:- Premium price
- Louder cabin noise
- Overkill for daily comfort
Best for: Track enthusiasts and drivers who prioritize aggressive sound and high-performance tuning.
Not ideal for: Daily drivers who prefer a more subdued, comfort-oriented exhaust setup.
- Material:Steel
- Fitment:B8 S5 4.2L
- Tips:Diamond Black
- Type:Track Edition
- Compatibility:Direct-fit
- Warranty:Manufacturer warranty
Bottom line: This option suits those seeking a race-inspired exhaust with premium quality and sound, and who are willing to pay for it.
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 T-304 Stainless Steel Tips Om Each Side
The BORLA system is celebrated for its distinctive, powerful sound that complements the sporty character of the Audi Quattro, making it a favorite among enthusiasts. Compared to the more aggressive AWE Tuning system, the BORLA setup offers a slightly more refined tone with less drone, ideal for those who want a robust but not overwhelming soundtrack. Its all-welded T-304 stainless steel construction promises longevity, and the dual split rear exit with polished tips adds a premium visual touch. However, being more subdued in sound than the AWE system might disappoint those seeking maximum auditory impact. Its rank in sales also suggests it’s a niche product, highly regarded but not the most popular choice for all owners.
bestFor: Enthusiasts valuing signature sound and top-tier build quality over maximum volume.
notIdealFor: Drivers wanting the loudest, most aggressive exhaust for a track day or loud cruising.
- Pros: Signature powerful sound, durable T-304 stainless steel, elegant dual split tips, high-quality welds
- Cons: Less aggressive tone than some competitors, slightly higher price, moderate sales rank
verdict: This pick is perfect for owners seeking a refined, recognizable sound with excellent craftsmanship.
specs: Material: T-304 Stainless Steel, Fitment: 2014-2020 Audi Quattro 4 Cyl., Tips: 3.5″ Round Polished, Exit: Dual Split Rear, Construction: All-welded, Warranty: Manufacturer warranty
Pros:- Signature powerful exhaust sound
- High-grade T-304 stainless steel
- Premium dual split tips
- Durable welded construction
Cons:- Less aggressive than Track Edition
- Higher price point
- Moderate sales rank indicates niche appeal
Best for: Enthusiasts valuing signature sound and top-tier build quality over maximum volume.
Not ideal for: Drivers wanting the loudest, most aggressive exhaust for track or loud cruising.
- Material:T-304 Stainless Steel
- Fitment:2014-2020 Audi Quattro 4 Cyl.
- Tips:3.5″ Round Polished
- Exit:Dual Split Rear
- Construction:All-welded
- Warranty:Manufacturer warranty
Bottom line: This pick is perfect for owners seeking a refined, recognizable sound with excellent craftsmanship.
How We Picked
The products in this roundup were evaluated based on performance impact, sound quality, build materials, ease of installation, and overall value. I prioritized systems that offer noticeable improvements in exhaust tone and flow, while also considering durability and customer feedback. The ranking reflects a balance between high-end performance and accessibility, with an emphasis on systems that cater to both daily drivers and enthusiasts. Cost-effectiveness was also a factor, but premium materials and craftsmanship elevated certain options above others. This approach ensures that each recommendation suits different driver priorities without sacrificing essential quality.Factors to Consider When Choosing Best Cat-back Exhaust Systems For Audi S5
Choosing the best cat-back exhaust system for your Audi S5 involves understanding several key factors. Beyond raw sound, you’ll want to consider materials, installation complexity, and how the system affects your vehicle’s performance. A well-chosen exhaust can enhance your driving experience without causing unwanted noise or performance issues. It’s important to weigh your daily driving needs against your desire for a louder, more aggressive sound. Being aware of common pitfalls, like incompatible fitment or excessive drone, can help you make a more informed decision.Sound and Tone
Sound is often the main reason for upgrading your exhaust, but it’s also subjective. Some systems emphasize a deep, refined tone suitable for daily driving, while others deliver a more aggressive, race-inspired roar. Consider whether you want a subtle enhancement or a noticeable change that turns heads. Remember that louder exhausts can increase drone inside the cabin, which might affect comfort on long drives. Listening to sound clips and reading user reviews can help gauge how each system performs in real-world conditions.
Material Quality and Durability
The longevity of your exhaust depends heavily on the materials used. T304 stainless steel is common for its corrosion resistance and strength, especially in regions with harsh weather. Diamond black tips, while aesthetic, also resist discoloration and rust better than polished finishes. Cheaper materials may save money initially but could deteriorate faster, leading to costly replacements. Investing in a system with high-quality construction ensures consistent performance and appearance over time.
Installation and Compatibility
Ease of installation varies among systems. Bolt-on designs with universal fitment tend to be more DIY-friendly, saving you money on labor. However, some systems require custom fitting or professional installation, adding to the overall cost. It’s also vital to verify compatibility with your specific S5 model and engine type to avoid fitment issues. Checking detailed product descriptions and customer support options can prevent surprises during installation.
Performance Gains
While most cat-back exhausts promise increased horsepower and torque, the actual gains are often modest but noticeable. A good system improves exhaust flow, reduces backpressure, and enhances throttle response. High-quality systems may also include aerodynamic design features that improve efficiency. However, avoid systems that claim unrealistic power boosts; the primary benefits are often in sound and aesthetics, with performance improvements being secondary.
Cost and Value
Prices range widely, from budget-friendly options to premium systems with advanced materials and craftsmanship. While it might be tempting to choose the cheapest option, investing in a reputable brand often results in better durability, sound quality, and residual value. Consider your long-term goals: a more expensive system might save money over time by lasting longer and requiring fewer replacements. Balance your budget with the features that matter most to you, like sound level or material quality.
Frequently Asked Questions
Will a cat-back exhaust system increase my Audi S5’s horsepower?
Most cat-back exhaust systems provide a slight increase in horsepower and torque by improving exhaust flow and reducing backpressure. While these gains are often modest—typically around 5-15 horsepower—they can improve throttle response and overall driving feel. The actual benefit depends on the system’s design and how well it complements your engine. For significant power increases, additional modifications like ECU tuning might be necessary, but a high-quality exhaust can be a good starting point for performance upgrades.
How loud will my exhaust be after installation?
The noise level varies significantly based on the system chosen. Systems labeled as ‘Track Edition’ or with larger tips and aggressive design tend to produce louder, more pronounced exhaust notes. Conversely, Touring or quieter systems aim to enhance sound subtly without excessive drone. Keep in mind that installation location, muffler design, and interior sound insulation all influence perceived volume. Listening to sound clips and reading user reviews can help set realistic expectations for your preferred noise level.
Are aftermarket exhaust systems legal for street use?
Legality depends on local regulations regarding noise levels and emissions. Many aftermarket systems are designed to meet street-legal standards, but some, especially louder ‘Track’ editions, might not be compliant in certain areas. It’s advisable to check your state or country’s laws before making a purchase. Installing a system that exceeds legal noise limits can lead to fines or failed inspections. Opting for systems with proper certification or emission compliance ensures legal use and peace of mind.
Will a new exhaust system affect my vehicle’s warranty?
Installing an aftermarket exhaust can potentially impact your vehicle’s warranty if it’s linked to emissions or factory performance standards. Many manufacturers specify that modifications might void certain warranty aspects, especially if a modification causes damage or fails emissions testing. However, some brands produce systems that are designed to be compatible with warranty coverage, often with proper documentation. It’s wise to consult your dealership or review warranty terms before proceeding to avoid unexpected issues.
How difficult is it to install a cat-back exhaust myself?
The complexity depends on your mechanical skills and the specific system chosen. Many bolt-on systems come with detailed instructions and require only basic tools, making them accessible for DIY enthusiasts. However, some installations may involve removing the stock exhaust entirely, which can be challenging if parts are rusted or hard to reach. If you’re unsure or lack the necessary tools, professional installation is a safer choice to ensure proper fitment and performance.
Conclusion
The best overall choice for most Audi S5 owners is the AWE Tuning Touring Edition for its blend of refined sound and durable construction. If you prioritize maximum sound and performance, the AWE Tuning Track Edition is ideal, though it may be less comfortable for daily use. Budget-conscious buyers should consider the BORLA S-Type for quality at a more accessible price point. Beginners or those seeking a straightforward upgrade will find systems with bolt-on designs easier to install, while enthusiasts demanding top-tier materials should look at premium brands with stainless steel craftsmanship. Ultimately, your decision hinges on balancing sound preference, durability, and budget to match your driving style.
