RaceChip GTS Black + App Plug & Play Tuning Box for BMW M3 G80 / M4 G82 (S58) – Piggyback ECU Performance Chip, Bluetooth Power Module Remap Alternative, Up to +150hp, Stage 1 Throttle & Torque Upgrade

Unlock serious performance for your BMW G80 M3 and G82 M4

Give your S58 twin turbo straight-six the power and response it deserves with a premium plug-in power module featuring Bluetooth phone control. This high-spec piggyback unit is the smart remap alternative for drivers who want big bhp and torque gains, sharper throttle response and stronger mid-range pull, while keeping factory safety strategies intact.

We run this upgrade on our own cars and our customers love the step-change in driveability. Fast road or track day, it delivers confident overtakes, effortless acceleration and a more exciting drive without permanently altering the factory ECU.

Why owners choose this Bluetooth performance module

• Up to 30% more power and torque within safe factory reserves (figures are estimated and vehicle dependent)
• Mobile app control for live adjustment and quick switching between driving programs
• Keeps OEM engine protection functions active for peace of mind
• Warm-up protection - power comes in only once the engine is up to temperature
• Plug-in installation typically 10 to 15 minutes - fully reversible
• Potential fuel saving of up to 1 litre per 60 miles thanks to torque-optimised mapping (estimated)
• Perfect fit for BMW G80 M3 and G82 M4 models using the S58 engine

Built for reliability and heavy use

• Automotive-grade ARM Cortex-M3 processor for fast, precise signal optimisation
• Up to 7 analogue and digital channels for detailed control
• Nano-coated electronics for moisture protection
• Heat-resistant composite housing with pro fixing system
• Professional FCI connector for secure, OE-style connectivity
• Dimensions: 112 x 111 x 36 mm

Smart software features

• Vehicle-specific software v2.0_GTSBlack
• 7 fine-tuning maps so you can tailor the setup for road, track or towing
• Engine Protect System+ keeps stock safeguards active
• Integrated warm-up timer helps look after your turbos

Warranty cover

• 5-year product warranty on the hardware
• 2-year engine warranty up to £8,000 indemnity on major components
• Applies up to 60,000 miles and vehicle age up to 5 years
• Valid even if the manufacturer’s warranty has expired

The ideal remap alternative for BMW performance

This plug-and-play ECU companion gives you the extra bhp and Nm you want without a permanent flash, making it a great choice for leased vehicles or anyone who wants an easily reversible upgrade before dealer visits. Expect crisper throttle, stronger mid-range torque and smoother power delivery that suits fast road and track use.

Installation and fitting

DIY fitting is straightforward with plug-in connectors and clear instructions. Prefer professional installation or a health check on the day

Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

SEO-friendly search terms

BMW S58 tuning, BMW G80 M3 power upgrade, BMW G82 M4 power upgrade, plug and play ECU module, piggyback ECU for BMW, smartphone controlled tuning, remap alternative, performance chip for BMW M3, performance chip for BMW M4, Bluetooth tuning app, torque increase, horsepower upgrade, fast road setup, track day setup, reversible tuning solution, turbo petrol tuning.

Note: Power and fuel-economy improvements are estimates based on the manufacturer’s research and vary by vehicle condition, fuel quality and environment.