Genuine OEM Jaguar Lower Primary Timing Chain, part number AJ814105. This critical engine component ensures the synchronized movement of the crankshaft and camshafts, maintaining precise valve timing. It is positioned as a lower primary chain within the engine's complex timing system. Weighing approximately 0.235 kg, it is engineered for durability and reliable operation. Choosing a genuine OEM timing chain ensures factory-specified material strength and link geometry for optimal engine performance and longevity.