- mclaren 720s ecu tune - mclaren 720s stage 2 - 720s tuning - mclaren 720s horsepower upgrade - M840T tune RSS
McLaren 720S ECU Tune — 870HP Stage 2 | Cost, Process & Gains Guide (2026)
Why the 720S Responds So Well to ECU Tuning The McLaren 720S sits on the M840T — a 4.0-liter twin-turbo V8 that McLaren rates at 710 HP and 568 lb-ft from the factory. ECU tuning recalibrates boost pressure, air-fuel ratios, ignition timing, and torque management maps. The result is 800-870 WHP from the same hardware.
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