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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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McLaren 720S Race Downpipes vs Stock — Sound, Power & Full Guide

The McLaren 720S with the M840T 4.0L twin-turbo V8 is one of the most responsive supercars ever built. From the factory it produces 710 HP and covers 0-60 in under 2.9 seconds. But the factory exhaust system is heavily compromised by emissions regulations. Upgrading to race downpipes is one of th

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