Genuine OEM Porsche Tensioning Roller, part number 95510524300. This roller maintains proper tension on the timing belt or chain, ensuring accurate engine timing and preventing slippage. It is part of the engine's timing system, guiding the belt or chain. Constructed with high-quality bearings for smooth operation and durability. Genuine OEM tensioning rollers are precision-engineered to meet exact specifications, ensuring reliable timing system function and preventing catastrophic engine damage.