BenzUnited Parts
Mercedes AMG GT GTS GTR GTC ECU Tuning – M178 Optimized Performance
Mercedes AMG GT GTS GTR GTC ECU Tuning – M178 Optimized Performance
Custom Tuning — Contact for Quote
This tuning service is custom-tailored to your build. Please contact us with your vehicle's year, model, engine, and mods for pricing.
Request a QuoteWe'll respond within 1 business day.
Custom ECU performance tuning for Mercedes-AMG M178 4.0L biturbo V8 models
💡 Why Choose Our Tuning Service?
This isn’t a generic flash. Our M178 calibrations are developed in-house, optimized on the dyno, and tested on the street and track. Every map is custom-built around your fuel, hardware, and driving preferences to deliver maximum power with factory-level refinement and reliability.
- +120–150 whp with proper supporting mods
- +130–170 lb-ft torque increase
- Fuel maps available for 91, 93, and 100 octane
- Adjustable burbles, throttle response, and boost timing.
- Designed for consistent performance in all conditions
💰 Pricing
- ECU Tune: $1,995
- ECU Tune w/ Downpipe Purchase: $1,500 (save $495)
- MyGenius Handheld Programmer: $300 (required if using multiple maps)
- Additional Maps: $250 each
🚘 Vehicle Compatibility
Compatible with all Mercedes-AMG M178 4.0L biturbo models:
- AMG GT
- AMG GTS
- AMG GTR
- AMG GTC
- AMG GT Black Series (base support)
💬 Customer Reviews
“Picked up insane torque. Burbles are clean and tasteful. Car drives like it should’ve from factory.”
“Ran 10s on 91 octane with the tune. Daily-drivable but wildly fast. Perfect balance.”
🚚 How to Order
- Contact us with your vehicle details and current modifications.
- Select your tuning method:
- 📦 MyGenius Handheld Programmer (ships to you)
- 🚚 Mail-in ECU Service (fast turnaround)
- 🏁 In-Person Tuning at our Southern California location
- Enjoy your fully optimized M178 setup.
