Mercedes Benz W167/X290, GLE53/GT53/GT50/GT43 Catless Downpipe With Heatshield

The most direct way to unlock the M256. This catless performance downpipe removes the factory catalytic converter entirely on the Mercedes-AMG GLE53, GT43, GT50 and GT53, replacing it with a smooth mandrel-bent stainless pipe under full woven heat shielding.

Nothing else in the exhaust costs the engine as much flow as the standard downpipe. Taking the catalyst out of the equation is the single largest reduction in backpressure available, and it is where the biggest gains from a Stage 2 tune come from.

Manufactured from 304 stainless steel with mandrel bends and precision TIG welding throughout, wrapped in woven heat shielding, with the factory sensor bungs retained.

Key Features

Full Catalyst Delete

The greatest single restriction in the system removed, for maximum exhaust flow and the largest gain a downpipe can deliver.

Built for the Electrified M256

The M256 pairs a conventional turbocharger with an electric auxiliary compressor and a 48-volt starter-generator, so it builds boost almost instantly. That responsiveness is exactly why the restriction downstream is so noticeable - the engine makes the pressure quickly and then has to push it through a factory downpipe built to a noise target.

Full Woven Heat Shielding

Wrapped over the length of the pipe, reducing radiant heat into the engine bay and protecting the components packed around it.

304 Stainless Steel Construction

High-grade, corrosion-resistant material built to withstand the exhaust gas temperatures a tuned M256 produces.

Factory Sensor Bungs Retained

The oxygen sensors plug straight back into their original positions.

Smooth Mandrel Bends

Consistent bore through every bend, so the gain is in flow rather than just in volume.

Direct Bolt-On Fitment

Mounts to the factory turbo flange and mid section using the original mounting points and brackets, with no cutting or fabrication.

Performance Benefits

The largest power and torque gain available from a single exhaust part when tuned
Markedly faster spool
Sharper throttle response
A deeper, harder-edged inline-six note
Maximum reduction in backpressure
Lower under-bonnet temperatures thanks to the shielding

Vehicle Fitment

Mercedes-AMG GLE53 (W167, 2019-2023)
Mercedes-AMG GT53 4-Door Coupe (X290, 2019-2023)
Mercedes-AMG GT50 4-Door Coupe (X290, 2019-2023)
Mercedes-AMG GT43 4-Door Coupe (X290, 2019-2023)

3.0L Turbocharged M256 Inline-Six with EQ Boost

All four cars share the same M256 engine and downpipe layout, which is why one part covers the range. The M256 is a single-turbo inline-six, so it takes one downpipe - unlike the V6 43 models, which need a matched pair.

Please Note

Removing a catalytic converter is not legal for road use in Australia. This part is intended for off-road, track and motorsport use only, and it is the owner's responsibility to comply with the regulations in their state.

A catless downpipe will trigger a check engine light without a supporting ECU tune. An ECU tune is required, and professional installation is recommended.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles - including Volkswagen GTI & R models, Audi S/RS platforms, and Mercedes-AMG applications. Every product we offer is carefully selected for its quality, fitment, and real-world performance - tested by enthusiasts, for enthusiasts.