Mercedes W176/C117, A45/CLA45 AMG Catless Downpipe

Take the biggest restriction out of your Mercedes-AMG A45 or CLA45 with this catless performance downpipe, supplied in a bare polished stainless finish. The factory unit houses the catalytic converter in a tight, heavily restricted casting, and it is the first thing holding the car back once a tune goes on.

Manufactured from premium T304 stainless steel and precision TIG welded throughout, this downpipe replaces that casting with a smooth mandrel-bent path straight out of the turbine housing. The result is less backpressure, quicker spool and a car that feels considerably more urgent everywhere in the rev range.

Key Features

Catless Configuration
Removes the restrictive factory catalytic converter entirely for maximum exhaust flow and an aggressive exhaust tone. (For off-road or track use only.)

Smooth Mandrel-Bent Path
A consistent internal diameter through every bend, so exhaust velocity is preserved rather than lost at each corner.

Premium T304 Stainless Steel
High-grade, corrosion-resistant material built to withstand the exhaust gas temperatures a tuned four cylinder produces.

Flexible Braided Joint
Absorbs engine movement and driveline flex so the system is not stressed at the turbo flange, a common failure point on rigid aftermarket pipes.

Precision TIG-Welded Construction
Clean, strong welds that hold up under sustained heat cycling and boost pressure.

Direct Bolt-On Fitment
Mounts to the factory turbo flange and mid section using the original mounting points, with no cutting or fabrication required.

Performance Benefits (When Tuned)

• Increases of 25-35 HP and 40-60 Nm of torque

• Noticeably faster turbo spool and sharper throttle response

• Deeper, harder exhaust note with far more turbo and wastegate character

• The lightest of the three options, with nothing added over the bare pipe

Vehicle Fitment

• Mercedes-AMG A45 - W176 (2013-2018)

• Mercedes-AMG CLA45 - C117 (2013-2019)

• 2.0 litre turbocharged four cylinder

Please Note

This downpipe is supplied without heat shielding. If you want the thermal protection as well, the heat-shielded version of this same downpipe is also available, and is the option we would recommend on a daily driven car.

This is a catless downpipe intended for off-road or motorsport use only and may not comply with local emissions laws. An ECU tune is strongly recommended to realise the full benefit of the part and to manage the check engine light that removing the catalytic converter will otherwise trigger. Professional installation is recommended.

Why Choose Proven Performance Parts

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