The S58 engine in the G87 M2 is legendary for its forged factory strength, but pushing for massive horsepower figures or hybrid turbo upgrades requires further reinforced engine internals. Extreme cylinder pressures from aggressive ECU remapping test the limits of even M-developed components. Fortify your block using high-strength Forged Pistons and heavy-duty Forged Connecting Rods/Conrods. Secure your rotating assembly using high-tensile Upgraded Engine Bolts (ARP) and minimize internal drag with race-specification Performance Bearings (Conrod & Mains). Ensure a perfect seal under elevated boost using heavy-duty Engine Gaskets, and optimize your cylinder head airflow with Performance Camshafts and Valve Spring Upgrades.