The McLaren M838T 3.8-liter twin-turbocharged V8 is one of the most capable engine platforms in the supercar world — and it powers more McLaren models than any other engine in the company's history. Found in the 570S, 570GT, 540C, 600LT, 650S, and MP4-12C, the M838T responds to ECU calibration with gains that transform these already rapid supercars into genuinely terrifying machines. A Stage 2 tune on the 570S delivers 680 HP from an engine rated at 562 HP from the factory — and the 650S responds with similar aggression. This guide covers everything you need to know about ECU tuning...

The McLaren 720S is one of the most tuner-friendly supercars ever built. Its M840T 4.0-litre twin-turbo flat-plane-crank V8 responds dramatically to ECU calibration — a Stage 1 tune pushes past 780 hp, and with supporting hardware the platform comfortably reaches 900–1,100+ hp on stock turbos. The lightweight carbon MonoCell II chassis, hydraulic cross-linked suspension, and 7-speed SSG dual-clutch gearbox handle the extra power with minimal reinforcement.This guide covers Stage 1, Stage 2, turbo upgrade paths, GCC heat management, and real-world power expectations from YPG Motorsport in Kuwait.M840T Engine — Factory Specifications Model Years HP Torque Notes 720S Coupé 2017–2022 710...