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The Mercedes-AMG GT family runs the M178 — the dry-sump variant of AMG's 4.0L twin-turbo V8. Like its wet-sump sibling (the M177), the M178's stock high-pressure fuel pump is the first bottleneck when pushing beyond factory output. This guide covers HPFP upgrade options specifically for the AMG GT, GTS, GTC, GTR, and Black Series. M178 vs M177 — What's Different? The M178 shares the same 4.0L twin-turbo V8 block architecture as the M177 but uses a dry-sump lubrication system instead of wet sump. This allows the engine to sit lower in the chassis for a lower center of gravity —...

The Mercedes-AMG M178 is the dry-sump variant of AMG's 4.0L twin-turbo V8 — purpose-built for the two-door AMG GT platform. Found exclusively in the AMG GT, GTS, GTR, GT R Pro, and GT Black Series, it shares the M177's bore and stroke but uses a completely different dry-sump oil system, block casting, and accessory layout. At YPG Motorsport, we build complete M178 crate engines with forged internals for 1,500 HP+ capability. What Is an M178 Crate Engine? A crate engine — or long block — is a fully assembled engine ready for installation. Our M178 crate engines include the forged...