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What HP can the M178 handle with forged internals
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and a more aggressive exhaust note
Mercedes-Benz W205 C63 Catless Downpipes | YPG Motorsport E63 What HP can the M178Mercedes Benz W205 C63 Catless Downpipes M177 4. 0L Twin Turbo V8 YPG Motorsport catless downpipes for the Mercedes AMG C63 and C63 S (W205) replace the restrictive factory catalytic converters with full 3. 5 inch mandrel bent stainless steel pipes. Reduced backpressure means faster turbo spool, sharper throttle response, and a significantly more aggressive V8 exhaust note the deep growl and crackle that the M177 was always capable of producing.
