Valved Exhaust System for BMW M8 F91 / F92 / F93 4.4T (2019-2025)
Configuration
BMW M8 F91 / F92 / F93 4.4T Valved Exhaust System (2019-2025)
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 M8 F91 / F92 / F93 exhaust in detail.
F91 convertible, F92 coupé or F93 Gran Coupé: the M8 is the top of the BMW M range, with the most refined version of the S63, a 4.4-litre twin-turbo V8 with 600 hp, or 625 hp in Competition form, and 750 Nm. Built from 2019 to 2025, it pays for its luxury positioning with an acoustic price: it is probably the quietest BMW M ever built. The M850i with the N63 engine and the older M6 F1x have their respective pages.
BMW tuned its exhaust for cruising: particulate filter, generous silencers and electronic sound enhancement in the cabin. On a GT, some discretion makes sense; making it permanently compulsory does not. With the valves closed, the Rog cat-back leaves you the hushed M8 you bought; with the valves open, the S63 unleashes a deep, rich rumble, an authoritative climb and clear crackles on the overrun.
Fitting is done without welding on all three body styles: clamps, gaskets, about two hours, for a system bent to your VIN, with the factory valve control kept or the Rog remote installed.
The “Manifold” option sells the S63’s downpipes with their catalytic converters; with a factory map, they bring voice and a slight weight saving, with power still tied to an ECU remap. On the most luxurious of the M cars, the 200-cell downpipes are the obvious choice to keep emissions control; with 100 cells, the GT is accepted or not depending on the car and the rules in your country, and the decat version is reserved for track use. As for material, 304 stainless steel takes care of the bass, while titanium, around 40% lighter, takes care of the scales.
BMW M8 F91 / F92 / F93 4.4T exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicles and chassis codes | BMW M8 F91 convertible, F92 coupé, F93 Gran Coupé, base and Competition |
| Engine | S63, 4.4-litre twin-turbo V8, 600 or 625 hp, 750 Nm |
| Years | 2019-2025 |
| 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) | Downpipes with 200-cell or 100-cell catalytic converters, 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 M8 F91 / F92 / F93 4.4T exhaust.
M8 or M8 Competition, convertible, coupé or Gran Coupé: a single system?
Yes, all three body styles and both versions are listed on the page from 2019 to 2025; send us the VIN and we will check before building.
What is published for an M8 at Stage 2?
810 hp and 1,100 Nm, for the 600 hp version as well as the Competition, with downpipes and a remap at an approved tuner; the cat-back alone does not touch the ECU.
BMW M8 F91 / F92 / F93 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 M8’s electronic sound enhancement stay active?
The system does not modify the electronics; with the valves open, it is the real sound of the S63 that comes out of the exhaust, far more convincing than the version played in the cabin.
Does such a fast M8 really benefit from the Rog exhaust?
Its transformation is as much about character as figures: the voice finally lives up to the badge, without taking anything away from GT comfort with the valves closed.
BMW M8 F91 / F92 / F93 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 M8 F91 / F92 / F93 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 M8 F91 F92 F93: the 600 hp GT that whispers, the complete exhaust system guide
The M8 sits at the top of the BMW M range: 600 to 625 hp, the refinement of a grand tourer and performance that puts it up against the best sports cars of the day. But its luxury positioning comes...
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.
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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.
-
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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