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The Mercedes-AMG M156 6.2-litre naturally aspirated V8 is the engine that defined AMG’s modern era — powering the C63 (W204), E63 (W211/W212), CLK63, SL63, ML63, and the legendary SLS AMG. Unlike AMG’s current twin-turbo engines, the M156 relies entirely on displacement, high-revving capability, and airflow to make power. That makes exhaust modifications — particularly headers — one of the most effective ways to unlock additional performance from this engine. This guide covers the exhaust upgrade path for M156-equipped models, including long-tube headers, downpipes, and how these modifications pair with other performance upgrades. Why Headers Matter More on the M156 On...