Description
Designed specifically for the Mercedes-Benz M274 2.0T turbocharged engine, the Untd. Performance Catless Downpipe is engineered to significantly improve exhaust flow by eliminating the restrictive factory catalytic converter. By providing a freer-flowing exhaust path, this downpipe helps reduce backpressure, improve turbocharger response, and produce a deeper, more aggressive exhaust note.
Ideal for enthusiasts looking to improve the performance and sound of their M274-powered Mercedes-Benz, the Untd. Performance Catless Downpipe provides an excellent upgrade for both stock and modified vehicles.
Key Features
Catless Design – Increased Exhaust Flow:
The Untd. Performance Catless Downpipe removes the restrictive factory catalytic converter, allowing exhaust gases to exit the turbocharger more efficiently. The reduced restriction can help lower exhaust backpressure and improve overall turbocharger efficiency.
Improved Turbo Response & Performance:
With a significantly freer-flowing exhaust path, the downpipe can help the M274 turbocharger spool more efficiently. When combined with an appropriate ECU calibration, this can contribute to improved throttle response, turbo response, horsepower, and torque.
Aggressive M274 Sound:
The catless design gives the M274 engine a noticeably deeper and more aggressive exhaust tone. Turbo spool, exhaust flow, and overall engine character become more pronounced, especially when paired with a less restrictive cat-back exhaust system.
Premium Stainless Steel Construction:
Manufactured from high-quality stainless steel and designed to withstand the extreme temperatures and pressures generated by the turbocharged M274 engine. Precision-welded construction provides excellent durability for both street and performance applications.
Direct-Fit / Bolt-On Design:
Designed specifically for compatible Mercedes-Benz M274 applications, providing a straightforward installation using the vehicle’s existing exhaust mounting points and compatible exhaust components.
Tune Recommended / Required for Optimal Performance:
An ECU tune is strongly recommended and may be required after installing a catless downpipe. Proper calibration allows the M274 engine to take advantage of the increased exhaust flow and can help optimize performance, drivability, and boost control.
⚠️ 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, existing modifications, and emissions equipment.
For optimal performance, drivability, and compatibility, professional ECU tuning is recommended.
Why Upgrade?
The factory M274 exhaust system incorporates a catalytic converter designed primarily for emissions control. While effective for emissions reduction, the factory catalytic converter can create additional restriction in the exhaust system.
Replacing the factory downpipe with the Untd. Performance Catless Downpipe allows the M274 turbocharger to expel exhaust gases more freely by reducing exhaust restriction and increasing overall exhaust flow.
When combined with proper ECU tuning and supporting modifications, the Untd. Performance Catless Downpipe can help improve turbo response, throttle response, power potential, and exhaust sound while providing a freer-flowing foundation for further performance upgrades.
Compatibility
- Mercedes-Benz C200 – M274 – W205
- Mercedes-Benz C260 – M274 – W205
- Mercedes-Benz C300 – M274 – W205
- Mercedes-Benz E200 – M274 – W213
- Mercedes-Benz E260 – M274 – W213
- Mercedes-Benz E300 – M274 – W213
- Mercedes-Benz E-Class – M274 – W212
- Mercedes-Benz GLK260 – M274
- Mercedes-Benz M274 2.0L Turbo Applications – 2015+
Fitment may vary depending on model year, market, engine 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.
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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