Description
Designed specifically for the 4.0T EA825 twin-turbo V8 platform, the Untd. Performance Catless Downpipe with Heat Shield is engineered to significantly improve exhaust flow by eliminating the restrictive factory catalytic converter. The catless design provides a freer-flowing exhaust path, helping reduce exhaust backpressure, improve turbocharger response, and deliver a deeper, more aggressive exhaust note.
Developed for high-performance applications including the Audi SQ8, Audi RSQ8, and Lamborghini Urus, this downpipe combines increased exhaust flow with an included heat shield for additional thermal protection around the downpipe and surrounding engine-bay components.
Key Features
Catless Design – Maximum Exhaust Flow:
The Untd. Performance Catless Downpipe eliminates the restrictive factory catalytic converter, allowing exhaust gases to exit the EA825 twin turbochargers more efficiently. The reduced restriction helps improve exhaust flow and can contribute to lower backpressure and improved turbocharger efficiency.
Improved Turbo Response & Performance:
The freer-flowing catless design allows the EA825 turbochargers to expel exhaust gases more efficiently. When paired with an appropriate ECU calibration, this can help improve turbo response, throttle response, horsepower, and torque.
Aggressive EA825 V8 Sound:
Experience the unmistakable character of the 4.0T twin-turbo V8. The catless design produces a louder, deeper, and more aggressive exhaust tone while making turbo spool and exhaust notes more pronounced under acceleration.
Integrated Heat Shield:
The included heat shield helps reduce radiant heat from the downpipe and provides additional thermal protection for surrounding engine-bay components. This is especially beneficial in the high-temperature environment generated by the EA825 twin-turbo V8.
304 Stainless Steel Construction:
Manufactured from high-quality stainless steel and engineered to withstand the extreme temperatures and exhaust pressures produced by the EA825 engine. Precision-welded construction provides excellent durability for both performance and enthusiast applications.
Direct-Fit / Bolt-On Design:
Designed specifically for compatible Audi SQ8, Audi RSQ8, and Lamborghini Urus 4.0T EA825 applications, providing a straightforward replacement for the factory downpipe while maintaining compatibility with suitable OEM and aftermarket exhaust components.
Installation Hardware Included:
The downpipe includes replacement gaskets, bolts, and required installation hardware to help ensure a proper fit and secure installation. Supplied hardware helps simplify installation while providing the necessary components for proper sealing and mounting.
Tune Recommended / Required for Optimal Performance:
An ECU tune is strongly recommended and may be required when installing a catless downpipe. Proper calibration allows the EA825 engine and turbochargers to take full advantage of the increased exhaust flow while optimizing boost control, fueling, throttle response, and overall performance.
⚠️ Check Engine Light Warning
A Check Engine Light (CEL) may occur after installing this catless downpipe due to the removal of the factory catalytic converter and the resulting change in exhaust emissions readings.
A compatible ECU tune is recommended and may be required to properly calibrate the vehicle for the catless downpipe and address catalyst-efficiency-related fault codes. Tune requirements can vary depending on the vehicle, model year, ECU software, emissions equipment, and existing modifications.
For optimal performance, drivability, and compatibility, professional ECU tuning is recommended.
Why Upgrade?
The factory EA825 exhaust system incorporates catalytic converters designed for emissions control. While effective for emissions reduction, these components can create additional restriction in the exhaust system.
Replacing the factory downpipe with the Untd. Performance Catless Downpipe allows exhaust gases to flow more freely from the EA825’s twin turbochargers. Reducing exhaust restriction can help improve turbocharger efficiency and provide a more responsive and aggressive driving experience.
The included heat shield adds thermal protection around the downpipe and surrounding components, making this upgrade suitable for enthusiasts looking to improve both exhaust flow and engine-bay heat management.
When combined with proper ECU tuning and supporting modifications, the Untd. Performance Catless Downpipe provides an excellent foundation for extracting additional performance from the 4.0T EA825 twin-turbo V8, while significantly enhancing the vehicle’s exhaust character.
Compatibility
- Audi SQ7 – 4.0T EA825 Twin-Turbo V8
- Audi SQ8 – 4.0T EA825 Twin-Turbo V8
- Audi RSQ8 – 4.0T EA825 Twin-Turbo V8
- Lamborghini Urus – 4.0T EA825 Twin-Turbo V8
- Lamborghini Urus S – 4.0T EA825 Twin-Turbo V8
- Lamborghini Urus Performante – 4.0T EA825 Twin-Turbo V8
- 4.0T EA825 Twin-Turbo V8 Applications
Fitment may vary depending on model year, market, chassis configuration, ECU software, emissions equipment, and existing exhaust modifications. Please verify compatibility before ordering.
⚠️ Important Notice
CATLESS / OFF-ROAD USE ONLY: This product eliminates the factory catalytic converter and may not be legal for use on public roads in your jurisdiction. Check your local emissions, inspection, and vehicle regulations before installation.
A Check Engine Light may occur without appropriate ECU calibration. A compatible tune may be required for proper operation and optimal performance.
Professional installation and ECU calibration are recommended.
Untd. Performance is not responsible for emissions compliance, inspection requirements, or the legality of installing or operating this product on public roads.
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