The S63B44 V8 is a masterpiece of BMW M engineering, but if you intend to push the limits with larger turbochargers or aggressive mapping, fortifying the engine internals is highly recommended. Protect your block against massive cylinder pressures using high-strength Forged Pistons and heavy-duty Forged Connecting Rods/Conrods. Secure the rotating assembly with high-tensile Upgraded Engine Bolts (ARP) and reduce friction utilizing race-specification Performance Bearings (Conrod & Mains). Guarantee a leak-free seal with heavy-duty Engine Gaskets, and maximize your V8's volumetric efficiency with Performance Camshafts and Valve Spring Upgrades.