Tuning · BMW M4 (G82 / G83)
M4
S58
The S58 in M4 coupe and convertible form. 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
S58
Stock
503 bhp · 650 Nm (Competition)
Stage 3 ceiling
503 bhp
About this tune
The G82 / G83 M4 (2021-present) is the coupe and convertible companion to the G80 M3, same S58 twin-scroll twin-turbo straight-six, same MG1 DME, same 8HP gearbox. Stock is 503 bhp / 650 Nm on the Competition (which accounts for almost the entire UK market). Available as the G82 coupe and G83 convertible, with Competition xDrive and Competition RWD options. The M4 Competition is one of the most-tuned modern M cars in the UK; the S58 underneath has substantial headroom from factory.
BMW M4 tuning
The BMW M4 (G82 / G83, 2021–present) runs the S58 and leaves the factory at 503 bhp · 650 Nm (Competition), RWD or M xDrive, 8-speed M Steptronic or 6-speed manual. Samuel tunes the G82 Coupe and G83 Convertible to the same standard — every map hand-calibrated for the specific car, its fuel grade and its installed hardware, not a base file loaded and left. M4 Stage 1 alone takes it from 503 bhp · 650 Nm (Competition) to 650 bhp · 800 Nm on the standard turbo, flashed over OBD on BM3, MHD or MG Flasher.
Add the Stage 2 hardware and the M4 targets 720 bhp · 900 Nm; from there the S58 stretches to around 1500 bhp on a hybrid or big-turbo build with supporting fuelling. Whichever stage suits the M4, the file is delivered within 24 hours and is fully reversible to the supplied stock calibration.
Configurator
Build your M4 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 M4 tuning, stages, hardware and what to expect from the G82 S58
The G82 / G83 M4 (2021-present) runs the S58, the same 3.0-litre twin-scroll twin-turbo straight-six fitted to the G80 M3, G87 M2 and F97 / F98 X3 M / X4 M. From the factory, BMW set the M4 Competition at 503 bhp / 650 Nm; the hardware ceiling sits considerably higher. BMW M4 tuning with Samuel applies the same S58 Stage 1 / Stage 2 / Stage 2 Flex map family used on the M3, with a calibration matched to the G82 coupe or G83 convertible. BMW M4 G82 tuning works identically on Competition xDrive and Competition RWD variants, the engine, ECU and tune are the same.
Stage 1
650 bhp · 800 Nm
No hardware required. The MG1 DME is flashed via the OBD port, boost, ignition timing, fuel delivery and torque limiters all revised. BMW M4 Stage 1 unlocks 650 bhp and 800 Nm from the OEM hardware (up from 503 / 650 stock on the Competition). The BMW M4 chip tuning starting point, and the largest single performance step you can take on a Competition without touching exhaust hardware.
Every M4 tune Samuel produces is calibrated individually for the specific car, fuel grade and installed hardware, not a base map loaded and left. BMW M4 tuning done correctly accounts for the G82 / G83 chassis behaviour, the xDrive or RWD drivetrain calibration, the 8HP gearbox, 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 S58 support across every chassis in the family (G87 M2, G80 M3, G82 M4, F97 X3 M, F98 X4 M). MG1 DME OBD flashing, realtime monitoring via the BM3 app. The most widely used platform for S58 tuning.
Read more →
MHD
Full S58 support. Suitable for Stage 1, Stage 2 and Stage 2 Flex Fuel. Strong data-logging toolset and active community support.
Read more →
MG Flasher
Full S58 support. Clean interface and reliable flash process on the MG1 DME. A common alternative to BM3 for owners who prefer the MG ecosystem.
Read more →
xHP Flashtool
Compatible with the ZF 8HP gearbox fitted to the S58 family. Gearbox calibration matched to the ECU map, strongly recommended at Stage 2 and above where torque jumps significantly. Available as an add-on.
Read more →
ECU: MG1 DME across every S58 chassis. Accessible via OBD port, no bench flash required for Stage 1, Stage 2 or Stage 2 Flex Fuel.
M4 specs & stage targets
BMW M4 tuning at a glance
- Engine
- S58
- Body styles
- G82 Coupe · G83 Convertible
- Chassis codes
- G82 / G83
- Production
- 2021–present
- Drivetrain
- RWD or M xDrive
- Gearbox
- 8-speed M Steptronic or 6-speed manual
- Stock output
- 503 bhp · 650 Nm (Competition)
- Tuning ceiling
- ~1500 bhp on the right hardware
| Stage | Target |
|---|---|
| Stage 1 | 650 bhp · 800 Nm |
| Stage 2 | 720 bhp · 900 Nm |
| Stage 3, Hybrid Turbo | 800-1500 bhp depending on spec |
| Stage 3, Big Turbo Kit | 800-1500 bhp depending on spec |
FAQ
M4 tuning — frequently asked questions
M4 Stage 1 lifts the S58 from a stock 503 bhp · 650 Nm (Competition) to 650 bhp · 800 Nm, with no hardware required. The map is flashed through the OBD port on BM3, MHD or MG Flasher and is the starting point for almost every M4 owner — broader torque and sharper throttle response from the factory hardware.
This page covers the G82 Coupe and G83 Convertible (G82 / G83). They share the S58 engine and run the same core calibration, but every M4 tune Samuel delivers is tailored to your exact car, fuel grade and installed hardware — never a base map loaded and left.
Stage 2 on the M4 targets 720 bhp · 900 Nm and needs downpipes + midpipe + intakes. Everything else — turbo, fuel system, intercooler — holds within the Stage 2 figures on the S58.
On the right hardware spec the S58 in the M4 reaches around 1500 bhp. Stage 1 and Stage 2 run the standard turbo; beyond that needs a hybrid or full big-turbo conversion with supporting fuelling, and the calibration is built bespoke per car.
Yes — later M4 (G82 / G83) cars ship with a locked DME that must be unlocked once before any map can be written. It's a one-time step; after that the M4 flashes normally over OBD and the tune is fully reversible to the supplied stock file.
Remotely. Once Samuel has your build details, the calibrated M4 map is delivered to your flashing tool account (BM3, MHD or MG Flasher) within 24 hours and you flash it yourself over OBD in about 15 minutes. It's fully reversible — the original S58 stock file is supplied before you flash, so the car can return to factory at any time.
A factory warranty can be voided if BMW shows a tune caused a specific failure, so it's a personal call. Samuel's M4 maps are calibrated to stay within the mechanical limits of the S58 hardware, and because the tune is reversible to stock before any dealer visit, many owners run a tuned M4 without issue.
Keep exploring
Keep exploring M4 tuning
Other S58 models we tune: M2, M3, M3 CS (G80), M4 CS (G82), X3 M, X4 M.
Engine guide
S58 tuning
Every S58 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 M4, 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 M4 ECUs ship locked from the factory and need unlocking before any tune. Here is how it works.
Learn more