The 4.0-litre flat-six provides an incredibly robust foundation derived directly from Porsche motorsport, but dedicated competition engines require reinforced internal architecture. Strengthening the rotating assembly with Forged Pistons and Forged Connecting Rods provides durability against extreme mechanical stress. Securing these upgrades requires Uprated Engine Bolts (ARP) and low-friction Performance Bearings (Conrod & Mains). For builders optimising volumetric efficiency, Performance Camshafts alter valve timing for maximum top-end breathing. We also supply Misc Engine Parts, covering essential seals and gaskets for comprehensive flat-six rebuilds.