RaceChip GTS Black Bluetooth Tuning Box for BMW 8 Series G15 (2018+) (840i/840d/M850i) – Plug & Play Piggyback ECU/Chip Tuning Module, App Control, Remap Alternative, Power & Torque Upgrade, Petrol & Diesel

Premium plug-in power module for BMW 8 Series G15 2018 on

Unlock serious real‑world performance with the RaceChip GTS Black with app control, a high-end piggyback ECU upgrade engineered for the BMW 8 Series G15. Expect stronger midrange pull, crisper throttle response and effortless overtakes, all while keeping factory engine protection intact. It is the fast, reversible alternative to a remap that you can control from your phone.

Why enthusiasts choose this upgrade

• Up to 30 percent more power and torque within safe reserves, tailored to your specific engine control strategy. Power figures are estimated.
• Improved efficiency potential, with up to 1 litre less fuel per 60 miles possible thanks to torque optimisation. Fuel saving figures are estimated by extensive research carried out by RaceChip and are a guide for possible achievable outputs.
• Seven adjustable maps for road, commute and spirited driving, all switchable via the companion app.
• Warm-up protection and Engine Protect System Plus for added peace of mind.
• Quick plug-and-play installation in around 10 to 15 minutes using the supplied automotive-grade loom.

App control and smart features

Pair the module to your smartphone via Bluetooth and fine-tune on the go. Dial in your preferred calibration, monitor status and adapt to conditions without tools. It is simple, fast and fully reversible.

Engineered to OEM standards

• Motor-specific software: v2.0_GTSBlack
• 7 fine-tuning mappings
• Engine Protect System Plus
• Warm-up timer

Hardware specification

• ARM Cortex-M3 processor for rapid, precise signal processing
• Up to 7 analogue and digital channels for comprehensive control
• Chip electronics with Nano-Protect coating to resist moisture and vibration
• Pro-grade FCI connector and robust plug-in harness
• Ultra-resistant composite housing with pro fixing system
• Dimensions in mm: 112 L x 111 W x 36 H

Warranty and cover

• 5-year product warranty
• 2-year engine warranty up to £8,000
• Warranty period: 2 years
• Indemnity: £8,000 covering all major engine components
• Max odometer: 60,000 miles
• Max vehicle age: 5 years
• Applies even if the manufacturer warranty has expired

Our experience

We run these modules on our own builds and customer cars. Feedback is consistently positive, citing stronger acceleration, smoother delivery and excellent drivability. It is a top-tier solution for drivers who want gains without a permanent remap.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and expert advice.

Search-friendly benefits

Perfect for anyone looking for BMW 8 Series G15 performance upgrade, ECU piggyback, remap alternative, chip tuning module, power increase, torque boost, app-controlled tuning, plug-in harness, smartphone map switching and warranty-friendly tuning for petrol or diesel variants.