The P30 and P31 AMG Development Packages are the most sought-after option groups. Owners describe P31 as adding SLS-derived engine internals (lightweight forged pistons, connecting rods, revised crank and ECU) for roughly +30 hp to ~481, plus two-piece brake rotors, lowered suspension and Alcantara trim. …
P30 / P31 Development Package
Mercedes-Benz C63 AMG (W204) · buying