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Mercedes-AMG C63 W205 Stage 3 Turbo Upgrade โ Power Targets, Turbo Options & Full Build Guide (2026)
The Mercedes-AMG C63 W205 with the M177 4.0L twin-turbo V8 is one of the most capable turbo platforms ever built โ but the factory turbochargers run out of airflow around 650โ700 HP. At that point, exhaust gas temperatures climb, the compressor wheels can't move enough air, and the power curve flattens no matter how much boost you throw at it. That's where a Stage 3 turbo upgrade changes everything. This guide covers everything you need to know before upgrading the turbos on your W205 C63 or C63 S: when turbo upgrades make sense, what power levels to expect, which turbo...