Genuine OEM Porsche Engine Timing Chain, part number 0PB109252B. This chain connects the crankshaft to the camshaft, synchronizing valve timing for optimal engine performance. It is a critical part of the engine's timing mechanism. Weighing 0.735 kg, this timing chain is built to precise OEM standards. Genuine OEM timing chains ensure the correct tension and durability required for accurate valve timing and engine longevity.