Description
Disclaimer : Cancellations within 24 hours are subject to a cancellation fee. After 24 hours, a higher fee will apply.
Unleash the full capability of your 2015-2018 BMW X5M or X6M with the GCA Performance ECU Tune. Specifically developed for the S63 4.4L Twin-Turbo V8, this custom calibration delivers substantial gains in horsepower and torque while dramatically improving throttle response, turbo spool, and overall drivability.
Designed under the GCA Performance line, our ECU tune optimizes boost pressure, ignition timing, fuel delivery, and torque management to extract the maximum safe performance from your engine. Whether you're accelerating from a stop or pulling hard through the upper RPM range, you'll experience faster response, stronger mid-range torque, and relentless top-end power.
Every tune is tailored to your fuel octane and driving goals while maintaining smooth daily drivability. Your factory ECU software is securely backed up before tuning, allowing you to return your vehicle to stock 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 acceleration 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
- 2015 BMW X5M
- 2016 BMW X5M
- 2017 BMW X5M
- 2018 BMW X5M
- 2015 BMW X6M
- 2016 BMW X6M
- 2017 BMW X6M
- 2018 BMW X6M
Chassis
- F85
- F86
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
- Factory ECU software is securely backed up
- 100% Reversible, allowing you to return the vehicle to stock software at any time
