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New Tuning File Available: Fiat 500 1.4 T-Jet Stage 1 ECU Tuning File – V713MH81 (MM8GMK) HW670 - Stage 1 performance remap for Fiat 500 1.4 T-Jet MultiAir with MM8GMK ECU — enhanced throttle and midrange response
Welcome to the official discussion thread for the Fiat 500 tuning package. This calibration is specifically developed for the MM8GMK ECU and optimized to work seamlessly with the 6M.
Share your experience!
Have you flashed this file? Drop your dyno graphs, 0-100 times, reviews, or ask any technical questions below!
➜ Download Tuning File / View Full Specs
Discussion & Reviews: Fiat 500
Welcome to the official discussion thread for the Fiat 500 tuning package. This calibration is specifically developed for the MM8GMK ECU and optimized to work seamlessly with the 6M.
Share your experience!Have you flashed this file? Drop your dyno graphs, 0-100 times, reviews, or ask any technical questions below!
Note: All tuning files offered are dyno-tested and professionally calibrated for safe use. This file is intended for motorsport/off-road use. Ensure compliance with your country’s emissions regulations.
Extended Product Information
- Stage 1 remap for Fiat 500 1.4 T-Jet MultiAir with Magneti Marelli MM8GMK ECU
- Throttle response sharpened for quicker pedal feedback
- Boost & torque delivery optimised in midrange for stronger pull
- Safe calibration within mechanical tolerances — no hardware upgrades required
- Maintains factory fuel economy and drivability under light load
- All checksums corrected (OLS294 v2.70, Marelli MJ/MM6-11)
- Flash-ready full binary file (2 097 152 bytes) — no patching required
- Tested in controlled dyno environment
- Includes original file for reference and safe rollback
- For off-road/competition use only — check local emission laws
➜ Download Tuning File / View Full Specs
