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.
BMW M3 CS tuning
The F80 M3 CS (2018) is the send-off variant of the F80 M3 — S55 twin-scroll twin-turbo straight-six, factory-tuned to 460 bhp / 600 Nm (up from 425 / 550 on the standard M3), saloon body, M-DCT only, RWD. The hardware — block, head, turbos, MEVD17 DME — is identical to the standard F80. Only the factory software calibration and CS chassis setup differ. Samuel tunes the M3 CS using the same S55 map family applied to the F80 M3 and F82 M4: Stage 1 on BM3, MHD or MG Flasher to 520 bhp / 700 Nm; Stage 2 with downpipes, midpipe and intakes to 560 bhp / 750 Nm. Every file hand-calibrated for the specific car — not a base map applied to the model.
Engine
S55
Stock
460 bhp · 600 Nm
Stage 3 ceiling
460 bhp
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
About this tune
The F80 M3 CS (2018) is the limited-production send-off for the F80 M3 generation — lightweight, stiffer chassis, the most aggressive factory S55 calibration BMW shipped in a saloon. M-DCT only, rear-wheel drive only, saloon body only. The CS tunes identically to the standard F80 M3 from a hardware ceiling standpoint — same engine block, same turbos, same MEVD17 DME. Stage 1 and Stage 2 ceilings are the same as on the standard M3; the CS just reaches those ceilings from a higher starting point. Samuel includes xHP gearbox calibration as an available add-on, matched to the ECU map.
Compatibility
This M3 CS tune runs on Bootmod3, MHD or MG Flasher — all three flash the S55 over OBD. Compare platforms or see full S55 compatibility.
Engine guide
What the M3 CS map revision covers: S55 stages explained
The MEVD17 DME in the M3 CS has the same OBD flash path and hardware ceiling as every other S55 in the lineup. The CS factory calibration is the most aggressive stock S55 tune BMW shipped — 460 bhp / 600 Nm versus 425 / 550 on the standard M3 — which means Stage 1 closes a smaller gap to the hardware ceiling in absolute terms, but reaches the same final ceiling. Stage 1 targets 520 bhp / 700 Nm on OEM hardware; Stage 2 recalibrates around downpipes, midpipe and intakes for 560 bhp / 750 Nm. Add the Flex Fuel option at Stage 2 for up to 600 bhp on E40 blends. Every map is log-reviewed after the first flash before sign-off.
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.
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
Stage 1 on the M3 CS (F80) targets 520 bhp / 700 Nm from the 460 bhp / 600 Nm factory baseline — a 60 bhp / 100 Nm gain from the OEM S55 hardware. The MEVD17 DME is flashed via the OBD port on BM3, MHD or MG Flasher, no bench flash required.
This page covers the F80 M3 CS (2018) — S55 engine, saloon body, M-DCT only. Every tune Samuel delivers is calibrated for the specific car, its fuel grade and installed hardware — never a base map loaded and left. The G80 M3 CS (S58) is a separate page.
A factory warranty can be voided if BMW attributes a specific failure to the tune — that is a personal call. Samuel's M3 CS maps are calibrated to stay within the mechanical limits of the S55 hardware, and the tune is fully reversible to stock before any dealer visit. Many owners run a tuned M3 CS without issue.
BM3 is the most widely used on the S55 and the best pick if you want realtime monitoring through the app. MHD was historically dominant on the F-series M cars and has an excellent data-logging toolset. MG Flasher is a clean alternative on the MEVD17 DME. The calibration Samuel delivers is the same on all three.
Yes. Once you've driven the M3 CS on the new map, send your data logs back through your platform and Samuel reviews them before sign-off. The S55 rod-bearing condition is checked as part of the briefing on every M3 CS job; if anything needs adjusting, the file is revised.
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