Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unlock the full potential of your 2018-2023 BMW M5 or M5 Competition with the GCA Performance ECU Tune. Specifically engineered for the S63 4.4L Twin-Turbo V8, this custom ECU calibration delivers substantial increases in horsepower and torque while dramatically improving throttle response, turbo spool, and overall drivability.
Developed under the GCA Performance line, our ECU tune optimizes boost pressure, ignition timing, fuel delivery, and torque management to maximize safe performance. Experience stronger acceleration from low RPM through redline, improved mid-range power, and a sharper, more responsive driving experience whether on the street or the track.
Every tune is calibrated for your preferred fuel octane and driving style while maintaining smooth daily drivability. Before any modifications are made, your factory ECU software is securely backed up, allowing you to restore the original calibration at any time.
We Stand Behind Our Products
All German Car Accessories products are backed by our 1-Year Warranty.
Features
- Developed under the GCA Performance line
- Custom ECU calibration for the S63 Twin-Turbo V8
- Up to 100 HP and 100 lb-ft torque increase
- Sharper throttle response
- Faster turbo spool and improved boost control
- Stronger power delivery throughout the RPM range
- Octane-specific tuning calibration
- Adjustable or extended exhaust burble
- Factory speed limiter removal
- Configurable cold start (On/Off)
- Downpipe compatibility with check engine light suppression (Off-Road Use Only)
- Factory ECU backup included
- Fully reversible ECU tune
Tuning Specifications
Fitment
- 2018 BMW M5
- 2019 BMW M5
- 2020 BMW M5
- 2021 BMW M5
- 2022 BMW M5
- 2023 BMW M5
- 2019 BMW M5 Competition
- 2020 BMW M5 Competition
- 2021 BMW M5 Competition
- 2022 BMW M5 Competition
- 2023 BMW M5 Competition
Chassis
- F90
Engine
- 4.4L Twin-Turbo V8
- S63
Available Tune Options
- Stage 1 (Factory Downpipes)
- Stage 2 (GCA Performance Downpipes)
Stage selection will be confirmed after purchase. Stage 2 tuning is included at no additional cost.
Performance Gains
- Up to 100 HP Increase
- Up to 100 lb-ft Torque Increase
Actual gains may vary depending on fuel quality, vehicle condition, and supporting modifications.
Tuning Instructions
- Installation instructions are emailed after purchase
- Vehicle tuning is completed using the included ENET cable
- ENET cable included with purchase
- ECU unlock instructions are included if the ECU Unlock option is purchased
- Vehicles built after June 2020 (06/2020+) are equipped with a factory-locked ECU. If the ECU Unlock option is not purchased, the ECU must be unlocked separately before flashing.
- Factory ECU software is securely backed up
- 100% Reversible, allowing you to restore the factory calibration at any time
