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Mercedes-AMG GT, GTS & GTR Downpipe Guide — Catless & 200-Cell | M178 4.0T V8 | Power Gains, Sound & Installation
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,...