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AMG Built the M177 to Take Abuse — Here's What's Inside When Mercedes-AMG designed the M177, they didn't build a passenger-car engine and then add turbochargers. They built a motorsport-grade bottom end first and then wrapped a luxury car around it. The result is a 4.0-litre twin-turbo V8 with forged internals that can handle well over 800 HP on the stock rotating assembly — a claim very few factory engines can make. This guide breaks down exactly what AMG put inside the M177, why each component matters for high-power builds, and where the factory parts reach their limits. Forged Crankshaft...

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,...

The M178 short block gives AMG GT owners a fully forged, race-spec bottom end for their dry-sump 4.0L twin-turbo V8. Built in-house at YPG Motorsport in Kuwait with the same forged rotating assembly that goes into our complete M178 crate engines. Balanced, blueprinted, and ready for your heads and accessories. What Is an M178 Short Block? A short block is the engine's bottom end: block, crankshaft, connecting rods, pistons, bearings, and internal seals. It does not include cylinder heads, turbochargers, the dry-sump oil system, or accessories. You supply your own heads — either your originals or our M178 CNC-ported heads...

The M177 short block is the foundation of every big-power AMG 4.0L build. When you are pushing past 700–800 HP on the twin-turbo V8, the factory cast pistons and powder-metal rods become the limiting factor. Our M177 forged short block replaces them with a fully balanced, blueprinted bottom end built for 1,500 HP+ — assembled in-house at YPG Motorsport in Kuwait. What Is an M177 Short Block? A short block is the engine's bottom end: block, crankshaft, connecting rods, pistons, bearings, and internal seals. It does not include cylinder heads, turbochargers, intake, exhaust manifolds, or accessories. You supply and install...

If your M156 bottom end is the weak link — spun bearing, cracked piston, worn cylinders — our M156 short block build gives you a fully forged, race-spec bottom end ready for your heads and accessories. Built in-house at YPG Motorsport in Kuwait, every short block is blueprinted, balanced, and assembled to proven clearances that handle serious power. What Is an M156 Short Block? A short block is the foundation of your engine: the block itself, crankshaft, connecting rods, pistons, bearings, and all internal seals. It does not include cylinder heads, intake, exhaust manifolds, or accessories. You supply and install...