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

Free up the M256 without giving up emissions control. This catted performance downpipe replaces the restrictive factory unit on the Mercedes-AMG GLE53, GT43, GT50 and GT53 with a high-flow sports catalytic converter and full woven heat shielding.

The factory downpipe is the single biggest restriction in the system, and the standard catalyst is the tightest part of it. This one keeps a working catalyst in the system while releasing most of the flow a catless pipe offers, which is what makes it the sensible choice on a car that still has to do the daily drive. The sports catalyst also keeps the exhaust note cleaner and considerably less raspy.

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

Key Features

High-Flow Sports Catalytic Converter

A far less restrictive catalyst than the factory unit, retaining emissions control while releasing most of the flow a catless pipe offers.

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.

Cleaner Tone Than Catless

The catalyst takes the hard rasp out of the note, which is the difference between a car you still enjoy on a long drive and one you do not.

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

Strong gains in power and torque across the rev range when tuned
Faster spool on an engine that already responds instantly
Sharper throttle response
A deeper inline-six note without the rasp and drone of a catless pipe
Far less likely to trigger a check engine light than a catless downpipe
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

A high-flow sports catalytic converter is not a factory replacement part. Emissions hardware is regulated and the requirements vary between states, so please check your local regulations before purchasing or installing.

An ECU tune is recommended to realise the full benefit of the part, 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.