Awaken the CLA45 S AMG from its hibernation. The Armytrix Stainless Steel Valvetronic Cat-Back Exhaust System carves out an unrestrictive pathway to liberate exhaust flow, putting blazing power and a fortifying soundtrack in your possession. Switch between civil daily-driver quiet and full-blown beast mode at the push of a button.
What it is
A complete cat-back valvetronic exhaust system (SKU MB774C-C) comprising a stainless steel front pipe, mid pipe, valvetronic muffler, wireless remote control kit and EV motor bypass. The electronically controlled valves let you tune your exhaust note on demand – opening the valves frees up exhaust flow for maximum power, while closing them retains low-RPM back pressure to preserve torque and keep things quiet.
Fitment
Mercedes-AMG CLA45 / CLA45 S 4MATIC (C118 / X118), 2019–Present, M139 2.0L I4 turbo, OPF and Non-OPF variants. Fits both Left-Hand Drive and Right-Hand Drive cars. Different versions of OEM exhausts exist – use VIN & photos to verify your model prior to installation. An ARMYTRIX OBDII Control Module is required; on pre-facelift models the OEM Dynamic Select can also operate the valves (Comfort → Off / Sport → Auto / Sport+ → On / Racing → On).
Materials & construction
Premium SUS304 stainless steel construction with high-standard T.I.G. hand welding for the strongest, smoothest welds without welding slag. CNC-machined, 3D-scanned and reverse-engineered for precise, direct bolt-on fitment.
Valvetronic operation
Control your valves three ways – Smart Mode, Neighbour Mode and Beast Mode – via the included ARMYTRIX wireless remote or the ARMYTRIX smartphone app (Bluetooth, OBDII). A customisable automatic mode opens and closes the valves based on a predetermined RPM range or turbo boost, so you get a worry-free drive without constant manual switching. The app also provides real-time monitoring of vehicle data such as RPM, speed and fuel.
Key features
- Main pipe diameter: 3.15″
- Tips: Quad Carbon Fibre Oval 3.6″ x 4.2″
- Exclusive catalytic converter & OPF related fault-code clearing mechanism – reduces chances of a check-engine light
- Direct bolt-on installation
- Plug-and-play OBDII dongle module reduces install time by ~30% versus traditional cable wiring
- App-controlled valve system via OBDII port
- App compatible with Mercedes 2018+ models with LED dashboard
Available add-on options (sold separately)
Pair the cat-back with Armytrix downpipe/header options – high-flow de-catted down pipe with cat simulator (MB774-DD / ceramic-coated MB774-DDC) or 200-cpsi sport cat pipe (MB774-CD / ceramic-coated MB774-CDC) – and QC17 stainless steel quad carbon-fibre tips.
Important: the remote control module may vary or be excluded depending on the specific vehicle model. Please confirm compatibility with an authorised dealer before purchase.
Estimate shipping
Not sure if a part fits your vehicle? Contact us with your make, model, and year before ordering. We will confirm compatibility so you order the right part the first time.
Every product is covered by a 12-month manufacturer-backed warranty from the date of purchase.
Vero Motorsport works with a national network of authorised installers. Contact us with your location and fitment requirements for a recommended workshop in your area.
