Description
Gain additional performance from your VW Golf R Mk8 or Audi S3 8Y 2.0T EA888 EVO4 with the Untd. Performance 200 Cell High Flow Cat Downpipe. Designed as a high-flow alternative to the restrictive factory downpipe, this system improves exhaust gas flow while retaining a high-flow catalytic converter for a more practical balance between performance, sound, and emissions control.
The 200-cell high-flow catalytic converter significantly reduces exhaust restriction compared to the factory system, helping the EA888 EVO4 turbocharger evacuate exhaust gases more efficiently. The result is improved turbo response, sharper throttle response, increased exhaust-flow capacity, and additional power potential when combined with ECU tuning.
Key Features
200 Cell High-Flow Catalytic Converter – Improved Flow
The high-flow 200-cell catalytic converter provides substantially less restriction than the factory catalytic system while maintaining a catalyst designed for high-performance applications.
Improved Turbo Response & Performance
Reduced exhaust backpressure allows the turbocharger to operate more efficiently, helping improve spool characteristics, throttle response, and overall engine performance.
Increased Power Potential
The improved exhaust flow allows the EA888 EVO4 platform to better take advantage of ECU tuning and supporting modifications, particularly on Stage 1 and Stage 2-style setups.
Enhanced Exhaust Sound
The high-flow catalytic converter allows more of the 2.0T engine’s natural exhaust character to come through while maintaining a more refined sound compared with a completely catless setup.
Performance-Oriented 200 Cell Design
The 200-cell configuration provides a balance between exhaust flow and catalytic function, making this downpipe a more street-oriented alternative to a catless system.
Direct-Fit Design
Engineered specifically for the Volkswagen Golf R Mk8 and Audi S3 8Y 2.0T EA888 EVO4 platform for straightforward installation using the factory mounting locations.
Installation Hardware Included
Includes required installation hardware such as replacement gaskets, bolts, and related hardware where applicable.
Tune-Friendly Upgrade
The downpipe is designed to complement ECU tuning and other supporting modifications. A tune is recommended to take full advantage of the increased exhaust-flow capacity.
Estimated Performance Gain
Actual results will vary depending on ECU calibration, fuel quality, supporting modifications, vehicle condition, and dyno methodology. The following figures are estimated for the Golf R Mk8 2.0T EA888 EVO4, rated at approximately 315 HP, with the factory turbocharger and 91–93 octane pump fuel.
| Tuning Level | Estimated HP Gain | Estimated Output | Estimated Torque Gain |
|---|---|---|---|
| Stock Tune | ~4–8 HP | ~319–323 HP | ~5–10 WTQ |
| Stage 1 Tune | ~50–70 HP | ~365–385 HP | ~50–75 WTQ |
| Stage 2 / Performance Tune | ~70–85 HP | ~385–400 HP | ~70–100 WTQ |
Stock Tune:
The factory ECU can benefit from the reduced exhaust restriction, but the stock calibration will not fully utilize the additional flow. Expect approximately +4 to +8 HP and +5 to +10 WTQ, depending on conditions.
Stage 1 Tune:
With a Stage 1 ECU calibration, the improved exhaust flow can complement the factory turbocharger and supporting hardware. Estimated gains are approximately +50 to +70 HP, with total output around 365–385 HP.
Stage 2 / Performance Tune:
When combined with a downpipe-compatible performance calibration, the 200-cell high-flow downpipe can support approximately +70 to +85 HP over the factory Golf R output, resulting in an estimated 385–400 HP and approximately +70 to +100 WTQ.
The 200-cell catalytic converter provides a strong balance between performance and practicality, while still offering improved flow for tuned applications.
Performance figures are estimates only. Actual results will vary based on ECU calibration, fuel, supporting modifications, ambient conditions, dyno type, and vehicle condition.
Check Engine Light & ECU Tuning
Unlike a completely catless downpipe, the 200-cell high-flow catalytic converter is designed to maintain catalytic function while reducing exhaust restriction.
However, catalyst efficiency monitoring can vary depending on the vehicle, ECU calibration, catalyst condition, and tuning strategy. A check-engine light may still occur in some applications if the ECU determines that catalyst efficiency is outside its expected parameters.
For optimal performance and proper integration with the vehicle’s ECU strategy, a compatible ECU tune is recommended when running the downpipe on a modified vehicle.
Why Upgrade?
The factory downpipe on the EA888 EVO4 is designed around emissions compliance, noise control, durability, and everyday drivability. For performance applications, replacing it with a freer-flowing 200-cell system can reduce exhaust restriction and improve the efficiency of the turbocharged 2.0T engine.
The Untd. Performance 200 Cell High Flow Cat Downpipe can help:
- Reduce exhaust backpressure
- Improve turbocharger response
- Improve throttle response
- Increase exhaust-flow capacity
- Support higher-power ECU calibrations
- Enhance exhaust sound
- Maintain a catalytic converter
- Provide a more street-oriented alternative to a catless downpipe
Compatibility
Volkswagen Golf R Mk8
- VW Golf R Mk8 2.0T EA888 EVO4
Audi S3 8Y
- Audi S3 8Y 2.0T EA888 EVO4
The 200-cell high-flow downpipe is designed for the EA888 EVO4 2.0T platform and is intended for compatible Golf R Mk8 and S3 8Y applications.
Important Notice
⚠️ HIGH-FLOW CATALYTIC CONVERTER / PERFORMANCE USE
This product uses a 200-cell high-flow catalytic converter and is designed to provide improved exhaust flow compared with the factory downpipe.
Emissions legality and inspection compliance can vary by jurisdiction. Verify local emissions regulations before installation or use on public roads.
A compatible ECU calibration is recommended for optimal performance. Professional installation and ECU calibration by a qualified performance specialist are recommended.
Estimated horsepower and torque figures are not guaranteed and will vary depending on fuel, tune, supporting modifications, environmental conditions, dyno methodology, and vehicle condition.
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