Tuning · BMW M4 CS (F82)
M4 CS
S55
The CS treatment of the F82 M4, sharper map, lighter weight, more theatre. Hand-calibrated from Stage 1 to a fully bespoke big-turbo build.
Engine
S55
Stock
460 bhp · 600 Nm
Stage 3 ceiling
460 bhp
About this tune
The F82 M4 CS (2017-2018) is the lightweight, more aggressive derivative of the F82 M4 Competition, same S55 twin-scroll twin-turbo straight-six, with a sharper factory map (460 bhp / 600 Nm vs 425 / 550 on the standard M4). Coupe only, RWD only, M-DCT only. The CS treatment includes lighter wheels, a stiffer chassis setup, and a more aggressive factory throttle calibration, and it tunes identically to every other S55 car from a hardware ceiling standpoint.
BMW M4 CS tuning
For two years, 2017 and 2018, BMW sold a harder M4 and called it the CS: lighter wheels, a stiffer chassis setup, coupé and DCT only, and a factory map already turned up beyond the standard car's. People who buy one tend to drive it properly, and that is who tunes it, not for a headline number but because the CS chassis can plainly carry more than BMW gave it.
The CS ships at 460 bhp and 600 Nm, so Samuel's Stage 1 target of 520 bhp and 700 Nm reads as a smaller step than on a standard M4, until you feel how differently the torque is delivered, arriving sooner and staying flat where the factory map tapers. With downpipes, midpipe and intakes fitted, Stage 2 raises the mark to 560 bhp and 750 Nm on the original turbos.
Nothing about the CS badge lowers the hardware ceiling: the same 1,200 bhp big-turbo territory available to any S55 is available here, through hybrid or full-frame conversions with proper fuelling. Files are built one at a time and sent remotely, into BM3, MHD or MG Flasher inside 24 hours, and because the stock calibration is preserved, a CS can be returned to exactly how BMW delivered it.
Configurator
Build your M4 CS 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 CS tuning, stages, hardware and what to expect from the F82 S55
The F82 M4 CS (2017-2018) is the more aggressive, lightweight derivative of the F82 M4 Competition, same S55 twin-scroll twin-turbo straight-six, with a slightly sharper factory map (460 bhp / 600 Nm vs 425 / 550 on the standard M4). BMW M4 CS tuning with Samuel applies the same S55 Stage 1 / Stage 2 / Stage 2 Flex map family used on the F80 M3 and F82 M4, the underlying hardware is identical, and the CS's higher factory baseline doesn't change the Stage 1 / Stage 2 ceiling, which is set by the turbo and fuelling hardware. Owners who buy a CS specifically for the sharper character get exactly that sharper character at every stage of the tune.
Stage 1
520 bhp · 700 Nm
No hardware required. The MEVD17 DME is flashed via the OBD port. BMW M4 CS Stage 1 unlocks 520 bhp and 700 Nm from the OEM hardware (up from 460 / 600 stock). The BMW M4 CS chip tuning starting point, the most cost-effective change available on the CS, and the most popular first modification owners make.
Every M4 CS tune Samuel produces is calibrated individually for the specific car, fuel grade and installed hardware, not a base map loaded and left. BMW M4 CS tuning done correctly accounts for the CS chassis behaviour, the M-DCT calibration, the S55's rod-bearing condition 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 S55 support across every chassis in the F-series M family (F80 M3, F82 / F83 M4, F87 M2 Competition, F82 M4 CS / GTS, F80 M3 CS). MEVD17 DME OBD flashing, realtime monitoring via the BM3 app. The most widely used platform for S55 tuning.
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MHD
Full S55 support, historically the dominant platform on the F-series M cars before BM3 caught up. Suitable for Stage 1, Stage 2 and Stage 2 Flex Fuel. Excellent data-logging toolset.
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MG Flasher
Full S55 support. Clean interface and reliable flash process on the MEVD17 DME. A common alternative to BM3 / MHD for owners who prefer the MG ecosystem.
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xHP Flashtool
Compatible with the 7-speed M-DCT (Getrag GS7D36BG) fitted to F-series M cars in automatic spec. Gearbox calibration matched to the ECU map, strongly recommended at Stage 2 and above where torque jumps significantly. Available as an add-on. Manual-gearbox cars do not need xHP.
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ECU: MEVD17 DME across every S55 chassis. Accessible via OBD port, no bench flash required for Stage 1, Stage 2 or Stage 2 Flex Fuel.
M4 CS specs & stage targets
BMW M4 CS tuning at a glance
- Engine
- S55
- Body styles
- F82 Coupe
- Chassis codes
- F82
- Production
- 2014–2020
- Drivetrain
- Rear-wheel drive
- Gearbox
- 7-speed DCT
- Stock output
- 460 bhp · 600 Nm
- Tuning ceiling
- ~1200 bhp on the right hardware
| Stage | Target |
|---|---|
| Stage 1 | 520 bhp · 700 Nm |
| Stage 2 | 560 bhp · 750 Nm |
| Stage 3, Hybrid Turbo | 600-1200 bhp depending on spec |
| Stage 3, Big Turbo Kit | 600-1200 bhp depending on spec |
FAQ
M4 CS tuning — frequently asked questions
Yes, and not mainly for the extra 60 bhp. The factory CS map, aggressive as it is for a production car, still leaves torque on the table through the mid-range. Stage 1 lifts the car to 520 bhp and 700 Nm and reshapes delivery so the DCT pulls harder between corners. It needs no hardware and takes minutes to flash.
No. The CS uses the same turbos, exhaust architecture and fuel system as the standard F82, so the recipe is identical: downpipes, midpipe and intakes for 560 bhp and 750 Nm. The difference is where you start from, not what you fit.
The same way as on any S55, with honesty. The hub is a legitimate community concern, most associated with abusive torque spikes rather than calibrated power. Samuel's maps keep torque within limits appropriate to your hardware, and for owners chasing big sustained numbers he will say plainly when a fixed hub should come first.
The CS is arguably the S55 best prepared for them from the factory, with its stiffer setup and lighter wheels. For circuit use Samuel calibrates with heat in mind, sustained load rather than just peak dyno figures, and will recommend keeping Stage 1 or a conservative Stage 2 unless your cooling and brakes have been upgraded to match.
The tune is fully reversible: the stock CS file is supplied before you ever flash, and returning the car to factory calibration takes one OBD session. Flash counters exist on the DME, as on any modern BMW, so absolute invisibility cannot be promised, but mechanically and in software the car goes back to standard.
Keep exploring
Keep exploring M4 CS tuning
Other S55 models we tune: M3 (F80), M3 CS, M4 (F82), M4 GTS, M2 Competition.
Engine guide
S55 tuning
Every S55 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 CS, 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 more