AMG GTR RSS

The Mercedes-AMG GT is one of the most capable grand tourers ever built — and its M178 4.0-liter twin-turbo V8 is the heart of that capability. Whether you own the GT, GTS, GT R, GT R Pro, or GT C, upgrading the factory downpipes is the single most effective bolt-on modification you can make to unlock serious power from the M178 platform.This guide covers everything you need to know about upgrading the downpipes on your AMG GT: catless versus 200-cell high-flow catted options, real-world power gains at each stage, exhaust sound changes, fitment across every C190/R190 body style, installation considerations,...

Mercedes-AMG uses two versions of its hand-built 4.0-litre twin-turbo V8: the M177 and the M178. They share the same bore, stroke, and hot-inside-V turbo layout — but they are not the same engine and they are not interchangeable. If you are ordering an engine build, turbo kit, or any internal component, you need to know which one you have. This guide explains the differences. Quick Comparison M177 M178 Displacement 3,982 cc (4.0L) 3,982 cc (4.0L) Configuration 90° V8, DOHC, 32-valve 90° V8, DOHC, 32-valve Turbo layout Hot-inside-V Hot-inside-V Oil system Wet sump Dry sump Block casting M177-specific M178-specific Oil pan...

The AMG GT platform demands heads that can flow under sustained high-RPM, high-boost, high-heat conditions — lap after lap. Our M178 CNC-ported heads are flow-bench developed for the dry-sump 4.0L V8, assembled with upgraded valvetrain, and sold as a matched pair. Built at YPG Motorsport in Kuwait, shipped worldwide. What Are CNC-Ported Heads? CNC porting reshapes the intake and exhaust ports using computer-controlled machining to our flow-bench program. Every port is cut to identical runner volumes and matched flow rates across all eight cylinders. On a twin-turbo engine like the M178, ported heads reduce pumping losses, improve turbo spool, and...

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 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...