Valved Exhaust System for BMW M5 G90 / G99 4.4T (2024+)
Configuration
BMW M5 G90 / G99 Valved Exhaust System (2024+)
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 BMW M5 G90 / G99 exhaust in detail.
The M5 G90 saloon and its G99 Touring sister mark a turning point: the 4.4-litre S68 twin-turbo V8, with its turbos between the cylinder banks, works alongside an electric motor and a plug-in battery. The whole delivers a combined 727 hp and 1,000 Nm, sent to all four wheels via M xDrive. This page covers M5s built since 2024; the E60, F10 and F90 M5 have their own pages.
The S68 has a deep, thick voice, with the typical V8 burble on the overrun, but on the factory M5 it arrives filtered by an exhaust that is both bulky and heavy, and the handover between electric and combustion power happens almost without you hearing it. With the valves open, our cat-back turns the V8’s start-up into an event and lets acceleration express itself fully; with the valves closed, both the saloon and the Touring keep the restraint needed in town.
Nothing in the hybrid drivetrain is modified: the system, built to your VIN, is fixed with clamps and gaskets, without welding, in about two hours, with factory valve control retained or a Rog remote.
The “Manifold” option sells the front section that follows the S68’s turbos, with its catalytic converter; on its own, it affects the voice and the weight, with power remaining a matter for an ECU remap by a tuner who knows hybrids. On a latest-generation hybrid M5, the logical choice is to keep a 200-cell catalytic converter and therefore emissions control; the 100-cell is accepted or not depending on the car and the rules in your country, and the decat version is reserved for track use. On such a heavy car, titanium, around 40% lighter than 304 stainless steel, has one more argument in its favour.
BMW M5 G90 / G99 4.4T exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicles and chassis codes | BMW M5 G90 saloon and M5 Touring G99 |
| Engine | S68, 4.4-litre twin-turbo plug-in hybrid V8, 727 hp and 1,000 Nm combined |
| Years | 2024+ |
| 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) | Front section with a 200-cell or 100-cell catalyst, or decat |
| Fitting | Clamps and gaskets, no welding, about 2 hours on a lift |
| Manufacturing and delivery | Made to order, 20 working days, free delivery |
| Warranty | 3 years, parts and workmanship |
Questions about the BMW M5 G90 / G99 4.4T exhaust.
G99 estate or G90 saloon: does the hybrid M5 need two different systems?
No, just one: the G90 saloon and the G99 Touring take the same Rog system, with the same clamp-and-gasket fitting. Your VIN is only used to confirm the version and model year before manufacturing.
Can an M5 G90 hybrid be remapped?
The page lists 900 hp and 1,150 Nm in Stage 2 for the saloon, with no figure for the Touring; on such a complex hybrid drivetrain, the work belongs with a tuner who masters the whole system, and the cat-back on its own does not touch it.
BMW M5 G90 / G99 4.4T 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.
Does the M5 G90 keep its silent electric mode?
Yes: the system only acts on the V8’s exhaust gases, and when the M5 runs on electric power, nothing leaves the exhaust; the handover to the combustion engine, however, becomes audible with the valves open.
On an M5 G90 weighing over two tonnes, is titanium worthwhile?
Because on such a heavy car, every kilo counts at the rear: titanium weighs around 40% less than stainless steel for the same design and gives the V8 a clearer note.
BMW M5 G90 / G99 4.4T: 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.
BMW M5 G90 / G99 4.4T: straight pipe or resonator?
On this model, two characters at the same price: the straight pipe for the raw sound of your engine, unfiltered, or the resonator for a rounder and slightly softer voice. Either way, the exhaust stays fully sporty. Learn more: Exhaust resonator: what does it do? Straight pipe or resonator, which sound to choose.
Rog expert guide
BMW M5 G90 / G99: the hybrid V8 finds its voice, the exhaust system guide
The M5 G90 saloon and its G99 Touring estate sibling mark a turning point: the S68 biturbo V8 works with an electric motor to reach 727 hp and 1,000 Nm combined. Such strength calls for a voice to match, which...
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.
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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.
-
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.
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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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