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The BMW N55 3.0-liter twin-scroll turbocharged inline-six is BMW’s most widely deployed performance engine of the 2010s — powering everything from the 335i and 435i to the M2 and M235i. It replaced the N54’s twin-turbo complexity with a single twin-scroll turbocharger, improving daily reliability while retaining serious tuning headroom. A Stage 2 ECU tune on the N55 delivers up to +100 Nm of torque and transforms the engine’s character from smooth cruiser to genuine performance weapon — and at $1,499, it’s one of the best value-for-power upgrades in the BMW ecosystem. This guide covers everything you need to know about...

M177 LS1 vs LS2 at a Glance Specification LS1 (C63) LS1 S LS2 (E63) LS2 S Power (HP) 469 503 563 603 Torque (Nm) 650 700 750 850 Compression 10.5:1 10.5:1 8.6:1 8.6:1 Turbo Type Mono-scroll Twin-scroll Max Boost (bar abs.) 1.9 2.1 2.3 2.5 Peak Power RPM 5,500–6,250 5,750–6,500 Max Fuel Pressure 200 bar 200 bar Transmission MCT 7-speed MCT 9-speed (725.0) Drivetrain RWD 4MATIC+ (variable AWD) The Mercedes-AMG M177 is a 4.0-litre twin-turbocharged V8 used across the modern AMG lineup — but not every M177 is created equal. The LS1 and LS2 power levels share displacement, bore, stroke,...