Tuning · BMW M3 CS (F80)
M3 CS
S55
The CS send-off for the F80 M3, stiffer chassis, more boost, the most aggressive factory map on the platform. 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 F80 M3 CS (2018) is the send-off special for the F80 M3, a lightweight, sharper-mapped derivative of the standard M3 with the S55 turned up from the factory to 460 bhp / 600 Nm. Saloon only, RWD only, M-DCT only. Limited production run, the most aggressive factory map of any standard F80, and like the M4 CS, it tunes to exactly the same S55 hardware ceiling as the standard cars; it just starts from a higher baseline.
BMW M3 CS tuning
The BMW M3 CS (F80, 2014–2018) runs the S55 and leaves the factory at 460 bhp · 600 Nm, Rear-wheel drive, 7-speed DCT. Samuel tunes the F80 Saloon 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. M3 CS Stage 1 alone takes it from 460 bhp · 600 Nm to 520 bhp · 700 Nm on the standard turbo, flashed over OBD on BM3, MHD or MG Flasher.
Add the Stage 2 hardware and the M3 CS targets 560 bhp · 750 Nm; from there the S55 stretches to around 1200 bhp on a hybrid or big-turbo build with supporting fuelling. Whichever stage suits the M3 CS, the file is delivered within 24 hours and is fully reversible to the supplied stock calibration.
Configurator
Build your M3 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 M3 CS tuning, stages, hardware and what to expect from the F80 S55
The F80 M3 CS (2018) is the send-off special for the F80 M3, a lightweight, sharper-mapped derivative of the standard F80 with the S55 twin-scroll twin-turbo straight-six tuned from the factory to 460 bhp / 600 Nm (up from 425 / 550 on the standard M3). BMW M3 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 hardware is identical between standard and CS, so the Stage 1 / Stage 2 ceiling is the same. The CS just gets there from a higher starting point.
Stage 1
520 bhp · 700 Nm
No hardware required. The MEVD17 DME is flashed via the OBD port. BMW M3 CS Stage 1 unlocks 520 bhp and 700 Nm from the OEM hardware (up from 460 / 600 stock). The BMW M3 CS chip tuning starting point, and the natural first modification for owners who buy the CS for its sharper character.
Every M3 CS tune Samuel produces is calibrated individually for the specific car, fuel grade and installed hardware, not a base map loaded and left. BMW M3 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.
Read more →
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.
Read more →
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.
Read more →
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.
Read more →
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.
M3 CS specs & stage targets
BMW M3 CS tuning at a glance
- Engine
- S55
- Body styles
- F80 Saloon
- Chassis codes
- F80
- Production
- 2014–2018
- 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
M3 CS tuning — frequently asked questions
M3 CS Stage 1 lifts the S55 from a stock 460 bhp · 600 Nm to 520 bhp · 700 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 M3 CS owner — broader torque and sharper throttle response from the factory hardware.
This page covers the F80 Saloon (F80). They share the S55 engine and run the same core calibration, but every M3 CS 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 M3 CS targets 560 bhp · 750 Nm and needs downpipes + midpipe + intakes. Everything else — turbo, fuel system, intercooler — holds within the Stage 2 figures on the S55.
On the right hardware spec the S55 in the M3 CS reaches around 1200 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.
Remotely. Once Samuel has your build details, the calibrated M3 CS 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 S55 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 M3 CS maps are calibrated to stay within the mechanical limits of the S55 hardware, and because the tune is reversible to stock before any dealer visit, many owners run a tuned M3 CS without issue.
Keep exploring
Keep exploring M3 CS tuning
Other S55 models we tune: M3 (F80), M4 (F82), M4 CS, 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 M3 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