Tuning · BMW M8 (F91 / F92 / F93) (F91 / F92 / F93)
M8 (F92)
S63
The S63 V8 in M8 coupe, convertible, and Gran Coupe form, the GT flagship, hand-calibrated from Stage 1 to a fully bespoke big-turbo build. Choose your package, send your build to Samuel, and get a tune that fits the way you actually drive.
Engine
S63
Stock
617 bhp · 750 Nm (Competition)
Stage 3 ceiling
617 bhp
BMW M8 (F91 / F92 / F93) tuning
As the flagship of the M range, the M8 arrived with nothing above it: coupe, convertible and Gran Coupe bodies (F91, F92, F93) built from 2019 onwards, all running M xDrive. Owners who tune an M8 usually are not chasing a faster commute; they want the flagship to feel like one, with the reserve of a properly liberated S63 under the long bonnet.
BMW rates the M8 Competition at 617 bhp and 750 Nm. Samuel's calibration work moves that to 680 bhp and 850 Nm at Stage 1, hardware untouched, and to 750 bhp and 900 Nm at Stage 2 once downpipes and intakes are on the car. Every M8 file is written against that specific chassis and its parts list, so a Gran Coupe on different fuel gets a different map.
Beyond the bolt-on stages, hybrid and big-turbo conversions take the M8's V8 into four-figure territory, up to roughly 1,000 bhp with the fuelling to match. Nothing about the process requires a workshop visit: choose the stage, send Samuel your build, and the file reaches your BM3, MHD or MG Flasher account inside 24 hours with the stock calibration retained. The M8's pair of locked DMEs takes a one-time unlock first.
Configurator
Build your M8 (F92) tune
Choose your stage — Stage 1, Stage 2 or Stage 3 — add the options that fit your car, and send the full build to Samuel for a custom remote remap. He'll quote, schedule, and personally calibrate within 24 hours of confirmation.
Add a stage or add-on
£0
Engine guide
BMW M8 (F92) tuning, stages, hardware and what to expect from the second-gen S63
The F91 / F92 / F93 M8 runs the second-generation S63, same revised 4.4-litre twin-turbo V8 as the F90 M5, with the full Competition spec from the factory. Stock figures: 617 bhp / 750 Nm. BMW M8 F92 tuning with Samuel takes the M8 into the same Stage 1 / Stage 2 territory as the F90 M5 with which it shares its engine, DME and gearbox. BMW M8 Coupe tuning (F92), M8 Convertible tuning (F91) and M8 Gran Coupe tuning (F93) all use the same map.
Stage 1
680 bhp · 850 Nm
No hardware required. The MG1CS003 DME is flashed via the OBD port, boost pressure, ignition timing, fuel delivery and torque limiters all revised. BMW M8 F92 Stage 1 unlocks 680 bhp / 850 Nm from the OEM hardware (up from 617 / 750 stock). The single most cost-effective change available on the F92 M8, and the BMW M8 chip tuning starting point for nearly every owner.
Every M8 tune Samuel produces is calibrated individually for the specific car, fuel grade and installed hardware, not a base map loaded and left. BMW M8 tuning done correctly accounts for the F91/F92/F93 chassis behaviour, the 8HP gearbox calibration and UK fuel quality; the map is reviewed against your data logs after the first flash and revised before sign-off.
Compatibility
Platform and hardware compatibility
Bootmod3 (BM3)
Full S63 support across every chassis in the family (M5 F10, M5 F90, M6 F1x, M8, X5 M, X6 M). MEVD17 and MG1 DME OBD flashing, realtime monitoring via the BM3 app. The most widely used platform for S63 tuning.
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MHD
Full S63 support across the M5 F10 / F90, M6, M8 and X5 M / X6 M platforms. Suitable for Stage 1 and Stage 2. Strong data-logging toolset for verifying air/fuel, ignition and oil temperature on a sustained pull.
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MG Flasher
Full S63 support. Clean interface and reliable flash process, a common choice for F90 M5 and M8 owners running the MG1 DME.
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xHP Flashtool
Compatible with the ZF 8HP gearbox fitted to every S63 chassis. Strongly recommended at Stage 2 where torque jumps to 900 Nm, the OEM shift logic isn't calibrated for that delivery. Available as an add-on.
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ECU: MEVD17.2.G (F10 / F1x), MG1CS003 (F90 M5 onwards). Accessible via the OBD port, no bench flash required for Stage 1 or Stage 2.
M8 (F92) specs & stage targets
BMW M8 (F91 / F92 / F93) tuning at a glance
- Engine
- S63 · 4.4L twin-turbo V8
- Body styles
- F92 Coupe · F91 Convertible · F93 Gran Coupe
- Chassis codes
- F91 / F92 / F93
- Production
- 2019–present
- Drivetrain
- M xDrive
- Gearbox
- 8-speed M Steptronic
- Stock output
- 617 bhp · 750 Nm (Competition)
- Tuning ceiling
- ~1000 bhp on the right hardware
| Stage | Target |
|---|---|
| Stage 1 | 680 bhp · 850 Nm |
| Stage 2 | 750 bhp · 900 Nm |
| Stage 3, Hybrid Turbo | 1000+ bhp depending on spec |
| Stage 3, Big Turbo Kit | 1000+ bhp depending on spec |
FAQ
M8 (F92) tuning — frequently asked questions
The engine package is: F91, F92 and F93 all use the same second-generation S63 and DME setup, so every stage on this page applies to all three. Each customer's file is still produced individually, because fuel, region and fitted hardware differ from car to car even within one body style.
Two things: downpipes and upgraded intakes. With those fitted the standard turbos support 750 bhp and 900 Nm, up from the Stage 1 figure of 680 bhp and 850 Nm. Everything else, turbochargers, intercooling and fuelling, remains factory at this level, and Samuel confirms the exact setup with you before writing the file.
On the right hardware, yes. The second-generation S63 supports 1,000-plus bhp with hybrid or full-frame turbos and supporting fuelling behind them. That figure is spec-dependent rather than guaranteed, which is why big builds are calibrated bespoke: send the complete parts list and Samuel maps the M8 around exactly what is fitted.
Not special, but the best you can reliably get. The headline stage figures assume high-octane super unleaded, and the map is calibrated to the fuel you tell Samuel you use. Consistently running a different grade than the file expects is the one thing to avoid, so be accurate when ordering.
Less than most expect. Your calibrated file appears in your BM3, MHD or MG Flasher account within 24 hours of Samuel receiving your build details, and flashing it is a guided, on-screen process through the OBD port. The stock M8 calibration stays saved throughout, so there is always a way back.
Keep exploring
Keep exploring M8 (F92) tuning
Other S63 models we tune: M5 (F10), M5 (F90), M6 (F1x), X5M (F15), X6M (F16), X5M (F95).
Engine guide
S63 tuning
Every S63 BMW we calibrate, with the full Stage 1, 2 and 3 breakdown for the engine.
Learn moreStages
Stage 1 & Stage 2 explained
What separates Stage 1 from Stage 2 on the M8 (F92), the real-world gains and the hardware each one needs.
Learn morePricing
How tuning is priced
How the licence, off-the-shelf maps and custom calibration are priced. We quote your exact spec, never a fixed menu.
Learn moreGuide
What is bootmod3?
New to remote flashing? A plain-English explainer on the platform and how a custom map reaches your car.
Learn moreBefore you flash
ECU unlock guide
Newer M8 (F92) ECUs ship locked from the factory and need unlocking before any tune. Here is how it works.
Learn more