This Genuine Porsche Engine Timing Chain Tensioner, part number PAC109217B, is a high-quality replacement component for your Porsche vehicle. It is designed to ensure proper tension and smooth operation of the engine's timing chain, which is responsible for synchronizing the rotation of the engine's camshaft and crankshaft. This tensioner is specifically designed and manufactured by Porsche to meet the exact specifications and standards of your vehicle, ensuring optimal performance and longevity. It is a genuine OEM part, meaning it is made by the original equipment manufacturer and is the same as the one originally installed on your Porsche. This timing chain tensioner is compatible with various Porsche models and is an essential component for maintaining the proper functioning of your engine.