Valved Exhaust System for Mercedes-AMG GT R C190 / R190 4.0 V8 biturbo (2019-2021)
Configuration
Mercedes-AMG GT R C190 / R190 Valved Exhaust System (2019-2021)
Valves
Operated by remote control, factory-paired.
Estimated at 0.50 m from the outlet, 45°, 2,000 rpm with a warm engine. Allow ± 2 dB depending on the engine and measuring point. A 3 dB difference is audible in a direct comparison; 10 dB sounds roughly twice as loud.
Configuration guide
Sound intensity with the valves open, on a scale of 0 to 10.
| Configuration | Intensity |
|---|---|
| Decat downpipe + Rog cat-back | 10/10 |
| 100-cell sports catalytic converter + Rog cat-back | 9/10 |
| 200-cell sports catalytic converter + Rog cat-back | 8/10 |
| Rog cat-back only, factory catalytic converter retained | 7/10 |
| Factory exhaust, for comparison | 3/10 |
The Mercedes-AMG GT R C190 / R190 exhaust in detail.
A dense rumble at idle, a full, hoarse climb, very pronounced lift-offs: the M178 of the GT R C190 has the typical voice of cross-plane crankshaft AMG V8s. Placed in the centre of the vee, its two turbos nevertheless round off its tone, and the factory exhaust, a compromise between sport and the demands of the road, lets only part of it through.
This page covers the GT R for the 2019 to 2021 model years; the 2017 and 2018 models are not covered, and the GT and the GT S have their own system. Dry sump, engine mounted very low in a front-mid position, 585 hp and 700 Nm sent to the rear wheels: the thrust never seems to fade right up to the rev limiter.
The Rog valved cat-back, or valve exhaust, changes this relationship: open, a frank rumble at start-up, furious climbs through the revs, downshifts clearly present under braking; closed, enough discretion to leave early in the morning for a circuit without being noticed. It is built to your VIN and fitted with clamps and gaskets, without welding, in about two hours, with the factory valves retained or the Rog remote.
The catalysed downpipe that follows the turbos is sold here under the “Manifold” option. For a GT R also driven on the open road, the 200-cell version keeps emissions control. The more open 100-cell will be accepted or not depending on the car and the rules in your country, so it is worth finding out before adopting it on a road-going GT R; the decat version, for its part, is reserved for track use, for track days. The page publishes a Stage 2 of 672 hp and 893 Nm, which assumes a full ECU remap. Titanium or 304 stainless steel: the former takes off around 40% of the mass, a real argument on a car designed for the track.
Mercedes-AMG GT R C190 / R190 4.0 V8 biturbo exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicles and chassis codes | Mercedes-AMG GT R C190 coupé and GT R Roadster R190 |
| Engine | M178, 4.0-litre dry-sump twin-turbo V8, 585 hp and 700 Nm, rear-wheel drive |
| Years | 2019-2021 |
| Materials and finishes | 304 stainless steel or titanium; titanium in brushed, gold or purple |
| Valves | Factory AMG modes or the Rog remote |
| Front section (option) | Downpipe with 200-cell or 100-cell catalytic converter, or decat |
| Fitting | Clamps and gaskets, no welding, about 2 hours |
| Manufacturing and delivery | Made to order, 20 working days, free delivery |
| Warranty | 3 years, parts and workmanship |
Questions about the Mercedes-AMG GT R C190 / R190 4.0 V8 biturbo exhaust.
Are the first GT R C190s, 2017 and 2018 model years, covered by this valved system?
Those two model years are excluded: the page covers the 2019 to 2021 GT R, system as well as front section. Send us your car’s VIN and we will study the case before any manufacturing, with no obligation.
With the downpipe and a new map, what power does the page quote for the GT R C190?
It shows 672 hp and 893 Nm at Stage 2, where the GT R’s M178 leaves the factory with 585 hp and 700 Nm. The AMG 4.0-litre V8 family exists in more powerful versions, a sign of real headroom. None of this is needed to enjoy the cat-back, which works with the original engine management.
Mercedes-AMG GT R C190 4.0 V8 biturbo with a Rog exhaust: what should you know about vehicle inspection?
With the cat-back only or the 200-cell sports catalytic converter, emissions control is retained: present the car with the valves closed. The 100-cell brings more sound and flow, and whether it is accepted at the emissions test depends on the car and local rules; the decat version is intended for track use.
Can the GT R C190’s AMG modes still be used to open the valves?
If the car left the factory with controlled valves, the exhaust connects to them and each mode keeps its behaviour. The Rog remote remains an option if you prefer to decide independently of the programme.
Does the AMG GT R Roadster R190 take the same system as the coupé?
Yes. The GT R C190 coupé and the GT R Roadster R190 take the same Rog system: same chassis, same 4.0 twin-turbo V8, same clamp-and-gasket fitting. Your VIN is only used to confirm the version and model year before manufacturing.
Mercedes-AMG GT R C190 / R190 4.0 V8 biturbo: Does a valved exhaust system drone?
No. With the valves closed, the gases flow through the whole rear silencer and the cabin stays calm at a steady speed. Our Rog exhausts are designed to avoid drone. Learn more: Why our systems stay calm on the motorway.
Rog expert guide
Mercedes-AMG GT R C190 / R190 V8 biturbo: the Beast of the Green Hell, the exhaust system guide
Nicknamed by AMG "the Beast of the Green Hell", in reference to the Nürburgring, the GT R C190 is the track-focused GT, with a 4.0-litre M178 biturbo V8 boosted to 585 hp. The paradox of this radical car: its factory...
In detail
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Rog presentation film: choosing your vehicle, Standard or Equal Length design, stainless steel or titanium, Z-Pipe, controlled valves, titanium and tip finishes, and support from choosing your configuration through to shipping.
THE Rog CRAFT
Our process.
From the first bend to the last check. The same care at every step.
-
Design
Designed for your vehicle.
Geometry matched to your model, carefully studied bends and precise mounting points. Everything starts with accurate design.
-
Manufacture
Crafted with precision.
Tube bending, part fitting and TIG welding: every joint receives the same care.
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Finishing
Material, elevated.
The finish reveals the character of the metal. Stainless steel or titanium, depending on the options available for your vehicle.
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Assembly
Every part in its place.
Components are assembled and adjusted. On valved systems, the mechanism is fitted, set up and tested.
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Inspection
Check. Then approve.
Geometry, welds, connections and gas flow: the key points are inspected before shipping.
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Shipping
Ready to join you.
Reinforced packaging protects your exhaust in transit. The final step before giving your vehicle a new voice.
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