The Audi RS6 C8 is one of the most powerful and desirable performance wagons on the road today. Its twin-turbocharged 4.0-liter V8 engine delivers incredible speed and torque, while maintaining everyday comfort and practicality. But for enthusiasts who want to take this beast to the next level, upgrading the exhaust system — particularly the downpipes — is one of the most popular and effective modifications.
Let’s dive deep into the world of Audi RS6 C8 downpipes catless and catted, explore their differences, benefits, and what you should know before upgrading.
What Are Downpipes and Why Do They Matter?
In any turbocharged vehicle, the downpipe is the section of the exhaust that connects the turbocharger to the rest of the exhaust system. It’s responsible for channeling exhaust gases away from the turbo and out of the car.
The stock downpipes on the Audi RS6 C8 are designed to meet emissions standards and keep noise levels within legal limits. However, these stock pipes can restrict exhaust flow, which in turn limits how quickly the turbochargers can spool up.
This is where performance downpipes — catless and catted options — come into play. By improving exhaust flow, they help the engine breathe better, produce more power, and sound more aggressive.
The Difference Between Catless and Catted Downpipes
When people talk about audi rs6 c8 downpipes catless and catted, they’re referring to two main design options:
1. Catless Downpipes
Catless downpipes remove the catalytic converter entirely. This allows exhaust gases to flow freely, with almost zero restriction. The benefits?
- Increased horsepower and torque thanks to better turbo response.
- Louder, more aggressive exhaust note that makes the RS6 sound like a true supercar.
- Lower exhaust gas temperatures, which can improve overall efficiency during hard driving.
However, catless downpipes also have some drawbacks:
- They do not meet emissions standards in most regions.
- The car may throw a check engine light (CEL) because sensors detect missing catalytic converters.
- They can be very loud, which some drivers may find too extreme for daily driving.
Catless downpipes are perfect for track cars or for enthusiasts who want maximum performance and don’t mind the extra volume or potential legal issues.
2. Catted Downpipes
Catted downpipes, on the other hand, include high-flow catalytic converters. These are designed to reduce harmful emissions while still improving performance compared to the stock setup.
Advantages of catted downpipes include:
- Improved power and sound, though slightly less than catless versions.
- Cleaner emissions, helping to stay compliant with regulations.
- Reduced cabin drone and more refined exhaust tone.
- Less chance of triggering a check engine light.
For most street-driven RS6 owners, catted downpipes offer the perfect balance between performance, sound, and legality.
Performance Gains You Can Expect
Whether you go catless or catted, upgrading the audi rs6 c8 downpipes catless and catted can unlock noticeable power gains. When combined with a proper ECU tune, owners often see:
- +40 to +70 horsepower increase
- Faster turbo spool-up
- Sharper throttle response
- Deeper and richer exhaust tone
With supporting mods like an upgraded intake and performance exhaust system, your RS6 can easily push beyond 700 horsepower while still maintaining everyday drivability.
Sound: The Heart of the Experience
Let’s be honest — one of the main reasons enthusiasts choose to upgrade to Audi RS6 C8 downpipes catless and catted is the sound.
Catless setups deliver a raw, thunderous growl that makes every gear shift feel dramatic. It’s the kind of sound that turns heads at every stoplight. Meanwhile, catted systems offer a more balanced, sporty tone — deep and aggressive under throttle but refined during cruising.
If you want to retain comfort for family trips or daily commutes, go catted. If your goal is pure excitement and you don’t mind being noticed, catless is the way to go.
Things to Consider Before Upgrading
Before you purchase or install Audi RS6 C8 downpipes catless and catted, here are a few key points to keep in mind:
- Always pair the upgrade with an ECU tune to prevent check engine lights and optimize performance.
- Make sure the parts are high-quality stainless steel to handle high exhaust temperatures.
- Check your local laws and emissions regulations — some regions are strict about modifications.
- Choose a trusted installer with experience in high-performance European cars.
Final Thoughts
Upgrading to Audi RS6 C8 downpipes catless and catted is one of the best ways to unleash the true potential of your car’s twin-turbo V8. Whether you prefer the unrestricted roar of catless downpipes or the refined balance of catted ones, both options can dramatically enhance performance and driving pleasure.
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