The Genuine Porsche Valve Spring Shim - 96410546101 is a high-quality shim designed specifically for use in Porsche vehicles. It is used to adjust the tension of the valve springs, which are essential components in the engine that help regulate the flow of air and fuel. This shim is made from durable materials to ensure long-lasting performance and is an authentic OEM part from Porsche. It is compatible with various Porsche models and is a crucial component in maintaining the proper functioning of the engine.