Bootmod3 S55 ECU Tune | BMW F8x M3, M4, M2 Competition
World's most advanced cloud-based ECU flash tuning platform, purpose-built for the S55-powered BMW M3, M4, and M2 Competition. Go from stock to full race calibration and everything in between with an on-the-fly map switch controlled straight from the steering wheel — no laptop or reflash required to change tunes.
Includes one OTS map of your choice on purchase, full CustomROM feature access (Flex Fuel tuning, AntiLag, Map Switching, GTS/CS transmission flash for DCT), and a built-in map editor for advanced or custom tuning through the bootmod3 Tuner Directory. Comprehensive datalogging across 70+ channels gives you real diagnostic insight alongside the performance gains.
Key Features
- Cloud-based tuning via mobile app (iOS/Android) and desktop (Windows/macOS)
- On-the-fly map switching using steering wheel cruise controls (4 switchable maps)
- Flex Fuel tuning — automatic ethanol blend management from 0–100%
- AntiLag function for stationary or rolling boost build
- GTS/CS transmission flash included for DCT-equipped vehicles
- Stage 1–2H maps available across 91/93/E30/E85/Race Gas
- Live Dash real-time parameter monitoring and full diagnostics/DTC clearing
- Advanced map editor with ~5000 tuning tables for custom/local tuner use
Fitment: BMW F8x M3, M4, M2 Competition (S55 engine, 2014–2020 M3/M4, 2018–present M2 Competition)
Requires: bootmod3 WiFi Adapter or OBD ENET cable (sold separately)
SKU: GCM-TUNE-BM3-S55
Important Information:
This product is intended for performance use and should be installed by a qualified professional.
It is the customer’s responsibility to ensure compatibility with their specific vehicle prior to purchase. If you are unsure, please contact us before ordering.
Gridline Custom Motorsports is not responsible for issues arising from incorrect installation, misuse, or improper product selection.
Due to the nature of performance parts, some items may be special order and subject to supplier availability and lead times.
Tuning Disclaimer:
Tuning products and ECU-related services are non-refundable once installed, activated, or used.
By purchasing, you acknowledge the risks associated with performance tuning, including potential impact on vehicle warranty and reliability.