Valved Exhaust System for Mercedes-AMG GLS63 X166 5.5 V8 biturbo (2015-2019)
Configuration
Mercedes-AMG GLS63 X166 Valved Exhaust System (2015-2019)
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 GLS63 X166 exhaust in detail.
The size of a long-distance cruiser and a 585 hp, 900 Nm 5.5-litre twin-turbo V8: the GLS63 X166, produced from 2015 to 2019, moves its mass with astonishing ease. The old GL63, before the name change, is not covered by this page; the GLS63 X167 with the 4.0-litre V8 has its own page.
This V8 from AMG’s golden era, with its generous displacement and rolling thunder, largely sleeps beneath silencers tuned for a luxury clientele. With the valves open, the Rog cat-back awakens its depth and its bangs on the overrun; with the valves closed, the GLS becomes a lounge on wheels for the whole family again, with its cruising comfort intact.
The GLS valved system, built to your VIN, bolts on in about two hours under this large chassis, without welding. The factory valve control is kept when the vehicle has one; otherwise, the Rog remote, with its unit in the boot.
Here the “Manifold” option refers to the 5.5-litre’s catalysed downpipe. Chosen with 200 cells, it keeps emissions control, the relevant version for an SUV like this. More open, a 100-cell, accepted or not depending on the car and the rules in your country, and a decat version, reserved for track use, hardly belong on an SUV of this size that carries the whole family. With a completely redone map, this V8 climbs to 693 hp and 1,208 Nm according to the page. Titanium removes around 40% of the mass for the same design; 304 stainless steel remains the most widespread choice.
Mercedes-AMG GLS63 X166 5.5 V8 biturbo exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicle and chassis code | Mercedes-AMG GLS63 X166 SUV |
| Engine | 5.5-litre twin-turbo V8, 585 hp and 900 Nm |
| Years | 2015-2019 |
| Materials and finishes | 304 stainless steel or titanium; titanium in brushed, gold or purple |
| Valves | Factory valve control if the car has it, otherwise 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 GLS63 X166 5.5 V8 biturbo exhaust.
Can my GL63 X166 from before the name change take the GLS63 system?
Not documented: our page targets the 2015 to 2019 GLS63 X166 5.5 and extends neither the system nor the front section to the GL63. If in doubt about your SUV’s name, the VIN settles it before manufacturing.
How far can a GLS63 X166 go when remapped with the downpipe?
According to our data, up to 693 hp and 1,208 Nm at Stage 2, against 585 hp and 900 Nm stock. These figures assume a full map; the cat-back on its own fits without touching the ECU.
For a vehicle inspection, how should a modified GLS63 X166 be configured?
Presented with the valves closed, with the factory front section or the 200-cell downpipe, it keeps a limousine sound and active emissions control. If the GLS has a 100-cell downpipe, its acceptance depends on the vehicle and your country’s rules. Reserved for track use, the decat variant has no reason to be on a GLS presented for inspection.
Do passengers in a modified GLS63 X166 hear the V8 all the time?
No: with the valves closed, the flow runs through the silencer and the cabin regains its factory calm. The driver opens up only when they wish.
Mercedes-AMG GLS63 X166 5.5 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 GLS 63 AMG X166: unleashing the AMG V8, the complete exhaust system guide
The GLS 63 X166 offers seven seats and an AMG twin-turbo V8 in a package that has become very affordable on the used market. The engine has the right voice; the factory exhaust holds it back. It is the family...
In detail
Rog Advisor
A question about this exhaust?
Fitment, sound, catalyst, valves, delivery: the answer comes straight away, with your configuration in context.
The Rog Advisor is an automated assistant trained on our product pages and answers. For an important decision, write to us: we confirm by e-mail.
Unsure about your configuration? Talk to us before you order. We know your car. Write to us at contact@rogmotorsport.com: we reply in writing, in English, within 24 hours. Email us
Reviews imported from our previous system and translated from French; verified purchases carry the badge.
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.
-
Finishing
Material, elevated.
The finish reveals the character of the metal. Stainless steel or titanium, depending on the options available for your vehicle.
-
Assembly
Every part in its place.
Components are assembled and adjusted. On valved systems, the mechanism is fitted, set up and tested.
-
Inspection
Check. Then approve.
Geometry, welds, connections and gas flow: the key points are inspected before shipping.
-
Shipping
Ready to join you.
Reinforced packaging protects your exhaust in transit. The final step before giving your vehicle a new voice.
Customer builds
Your videos & photos
The Rog lines fitted on our customers' vehicles, in real conditions.
- Builds
- 500+
- Brands
- 28
- Satisfaction
- 4,9
The journal
News & advice
Best valved exhaust for the Mercedes-AMG A45 / A45 S W177
Which valved exhaust for a Mercedes-AMG A45 or A45 S W177? The options compared (sound, material, valves) and the Rog...
Read the articleBest valved exhaust for the Audi RS3 8Y
Which valved exhaust for an Audi RS3 8Y? The options compared (sound, material, valves) and the Rog system made to...
Read the articleBest valved exhaust for the BMW M2 G87
Which valved exhaust for a BMW M2 G87? The options compared (sound, material, valves) and the Rog system made to...
Read the articleExhaust rules: what changes in 2026 and 2027 (Euro 7, noise cameras, MOT)
Euro 7, new-car noise, noise cameras, MOT and vehicle inspection, and models: what really changes in 2026 and 2027 for...
Read the articleChanging your exhaust: what inspections and approvals cost in 9 countries
What the periodic inspection and the check of a modification cost after changing your exhaust, in 9 European countries: official...
Read the articleIs a cat-back exhaust legal in Ireland? What the NCT checks.
A cat-back leaves your factory cat, sensors and OBD as they are; valves closed, very close to stock, valves open,...
Read the articleSports exhaust (sportsummuti) in Estonia: what the tehnoülevaatus checks.
The sound you choose, a discreet car when it matters: what a Rog valved exhaust gives you in Estonia, how...
Read the articleSports exhaust in Latvia: tehniskā apskate and the CSDD noise limit.
The sound you choose, a discreet car when it matters: what a Rog valved exhaust gives you in Latvia, how...
Read the articleNo article matches this search.
All articles