Tuning · BMW M4 GTS (F82)
M4 GTS
S55
The GTS, the F82 M4 stripped, caged and water-injected from the factory. Hand-calibrated from Stage 1 to a fully bespoke big-turbo build, with the WMI hardware already on the car.
Engine
S55
Stock
493 bhp · 600 Nm (water injection)
Stage 3 ceiling
493 bhp
About this tune
The F82 M4 GTS (2016) is BMW M's most extreme F-platform car, a stripped, roll-caged, lightweight F82 M4 with factory water/methanol injection (WMI) cooling the intake charge enough to run 493 bhp / 600 Nm from the S55 at factory. Coupe only, M-DCT only, limited production. The WMI hardware is fitted from new, and remains in place through Stage 1 / Stage 2 tuning, giving the GTS a uniquely capable platform for aggressive ignition timing on the stock turbos.
BMW M4 GTS tuning
The BMW M4 GTS (F82, 2014–2020) runs the S55 and leaves the factory at 493 bhp · 600 Nm (water injection), Rear-wheel drive, 7-speed DCT. Samuel tunes the F82 Coupe 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 GTS Stage 1 alone takes it from 493 bhp · 600 Nm (water injection) 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 M4 GTS 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 M4 GTS, the file is delivered within 24 hours and is fully reversible to the supplied stock calibration.
Configurator
Build your M4 GTS 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 GTS tuning, stages, hardware and what to expect from the F82 S55 (water injection)
The F82 M4 GTS (2016) is BMW's most extreme F-platform M car, a stripped, caged, lightweight F82 with the S55 paired to factory water/methanol injection (WMI). BMW set the M4 GTS at 493 bhp / 600 Nm from the factory, made possible specifically by the WMI hardware cooling the intake charge enough to run more aggressive boost and timing. BMW M4 GTS tuning with Samuel takes advantage of the same WMI hardware to push further still, the platform is uniquely suited to aggressive Stage 1 and Stage 2 maps because the cooling effect of the water injection is already built into the calibration. Tuning the GTS is one of the most interesting S55 projects on the platform.
Stage 1
520 bhp · 700 Nm
No hardware required, the factory WMI system stays in place. The MEVD17 DME is flashed via the OBD port. BMW M4 GTS Stage 1 unlocks 520 bhp and 700 Nm from the OEM hardware (the gain over the 493 bhp stock is smaller than on the standard M4 because BMW already pushed the GTS hard at factory; the headroom released here is in throttle response, mid-range torque and rev-range linearity rather than peak number).
Every M4 GTS tune Samuel produces is calibrated individually for the specific car, fuel grade and installed hardware, not a base map loaded and left. BMW M4 GTS tuning done correctly accounts for the WMI hardware integration, 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 GTS specs & stage targets
BMW M4 GTS 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
- 493 bhp · 600 Nm (water injection)
- 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 GTS tuning — frequently asked questions
M4 GTS Stage 1 lifts the S55 from a stock 493 bhp · 600 Nm (water injection) 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 M4 GTS owner — broader torque and sharper throttle response from the factory hardware.
This page covers the F82 Coupe (F82). They share the S55 engine and run the same core calibration, but every M4 GTS 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 GTS 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 M4 GTS 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 M4 GTS 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 M4 GTS 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 M4 GTS without issue.
Keep exploring
Keep exploring M4 GTS tuning
Other S55 models we tune: M3 (F80), M3 CS, M4 (F82), M4 CS, 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 GTS, 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