The Audi RS6 C8 is a high-performance masterpiece that blends practicality with incredible power. Its twin-turbocharged V8 engine delivers exhilarating performance right out of the factory, but there’s still room for enthusiasts to enhance its capabilities. One of the most impactful upgrades is installing audi rs6 c8 downpipes catless and catted. These components can significantly improve exhaust flow, turbo efficiency, and overall driving excitement. In this guide, we’ll explore the differences between catless and catted downpipes, their benefits, and what to consider before upgrading.
Understanding Downpipes in the RS6 C8
Downpipes connect the turbochargers to the rest of the exhaust system. In the stock configuration, these pipes often feature restrictive catalytic converters designed to reduce emissions but also limit performance. Upgrading to high-performance downpipes—whether catless or catted—reduces backpressure, allowing exhaust gases to exit faster. This leads to quicker turbo spool, more horsepower, and a more aggressive exhaust note.
Catless vs. Catted Downpipes – What’s the Difference?
Catless Downpipes
Catless downpipes remove the catalytic converters entirely. This design allows for maximum exhaust flow, reducing backpressure to its lowest point. The main advantages are:
- Highest possible horsepower and torque gains
- Faster turbo response
- Louder, more aggressive exhaust sound
However, catless downpipes are typically not street-legal in many regions due to emissions regulations. They can also produce a stronger exhaust smell because they don’t filter out pollutants.
Catted Downpipes
Catted downpipes retain catalytic converters but replace the restrictive stock versions with high-flow units. Benefits include:
- Significant performance gains compared to stock
- Cleaner emissions and compliance in many regions
- Reduced exhaust odor compared to catless
While catted downpipes don’t provide quite the same performance boost as catless versions, they offer a balanced compromise between power and legal compliance.
Benefits of Upgrading to Performance Downpipes
Whether you choose catless or catted downpipes, the upgrade can deliver:
- Increased horsepower and torque
- Improved throttle response and acceleration
- Enhanced turbo spool for quicker power delivery
- A deeper, sportier exhaust tone
When paired with a proper ECU tune, the gains can be even more impressive, transforming your RS6 C8 into an even more exhilarating machine.
Installation Process Overview
Installing high-performance downpipes requires mechanical skill, as well as the right tools and safety equipment. Here’s a simplified breakdown:
- Lift the Vehicle – Use a hydraulic lift or heavy-duty jack stands to secure your RS6 C8.
- Access the Downpipes – Remove the necessary underbody panels and heat shields.
- Disconnect Sensors – Unplug the O2 sensors and mark their locations for reinstallation.
- Remove the Stock Downpipes – Unbolt the factory units from the turbo outlets and exhaust.
- Install New Downpipes – Align your catless or catted downpipes, install new gaskets, and torque bolts to specification.
- Reconnect Sensors – Ensure all O2 sensors are correctly installed.
- Reassemble and Test – Reinstall heat shields, lower the vehicle, and test for leaks or abnormal sounds.
Choosing Between Catless and Catted
Your choice depends on your performance goals and legal requirements. If you’re building a track-focused RS6 C8 and want the maximum possible performance, catless downpipes are ideal. If you drive on public roads and want to stay emissions-compliant while still improving power, high-flow catted downpipes are the better choice.
Final Thoughts
Upgrading to high-performance downpipes is one of the most effective ways to elevate your Audi RS6 C8’s performance. Whether you opt for catless for ultimate power or catted for a balanced approach, the result will be a more responsive, aggressive, and thrilling driving experience. Pair the upgrade with a professional ECU tune, and your RS6 C8 will deliver a level of performance that truly matches its supercar status.