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

The most direct way to unlock the M260. This catless performance downpipe removes the factory catalytic converter entirely on the Mercedes-AMG A35, CLA35, GLA35 and GLB35, replacing it with a smooth mandrel-bent stainless pipe under full woven heat shielding.

Nothing else in the 35-series exhaust costs as much flow as the standard downpipe. Taking the catalyst out of the equation is the single largest reduction in backpressure available to the engine, and it is where the biggest gains from a Stage 2 tune come from.

Manufactured from T304 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.

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.

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, with no cutting or fabrication.

Performance Benefits

The largest power and torque gain available from a single exhaust part when tuned
Markedly faster turbo spool
Sharper throttle response
A deeper, louder and more aggressive exhaust note
Maximum reduction in backpressure

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

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.