Mercedes Benz W177/C118/H247/X247, A35/CLA35/GLA35/GLB35 Catted Downpipe With Heatshield

Free up the M260 without giving up emissions control. This catted performance downpipe replaces the restrictive factory unit on the Mercedes-AMG A35, CLA35, GLA35 and GLB35 with a high-flow sports catalytic converter and full woven heat shielding.

The factory downpipe is the single biggest restriction in the 35-series exhaust, 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 T304 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.

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.

Factory Sensor Bungs Retained

The oxygen sensors plug straight back into their original positions.

T304 Stainless Steel Construction

High-grade, corrosion-resistant material built to withstand the exhaust gas temperatures a tuned M260 produces.

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, with no cutting or fabrication.

Performance Benefits

Strong gains in power and torque across the rev range when tuned
Faster turbo spool and sharper throttle response
Deeper exhaust note without the rasp and drone of a catless pipe
Far less likely to trigger a check engine light than a catless downpipe
Reduced backpressure through the whole system

Vehicle Fitment

Mercedes-AMG A35 (W177, 2019-2025)
Mercedes-AMG CLA35 (C118, 2020-2025)
Mercedes-AMG GLA35 (H247, 2020-2025)
Mercedes-AMG GLB35 (X247, 2020-2025)

2.0L Turbocharged M260 Engine

All four cars share the same M260 engine and the same exhaust layout, which is why one downpipe covers the range. This part is for the 35-series cars. The A45, CLA45 and GLA45 run the hand-built M139 and use a different downpipe - see our W177/C118 A45/CLA45 listings for those.

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.