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Mercedes-AMG E63 W212 Downpipe Guide — M157 Catless vs 200-Cell, Power Gains, Sound & Install (2026)
Why Upgrade Downpipes on the E63 AMG W212?The Mercedes-AMG E63 W212 (2012–2016) uses the M157 5.5L biturbo V8 — a powerplant shared with the CLS63, S63, SL63, and G63 of the same generation. Factory downpipes include two primary catalytic converters creating significant exhaust restriction. Replacing them with high-flow downpipes reduces turbo spool time, increases peak power, and unleashes the deep V8 growl the M157 is known for.Catless vs 200-Cell Comparison Type HP Gain (with Stage 2) Torque Gain Emissions Sound Best For Catless (race) +80–120 WHP +90–130 lb-ft Off-road / track only Deep, aggressive V8 bark Max power builds 200-cell...