Genuine OEM Porsche O-Ring, part number 99970754440. This O-ring is designed to seal various components within the turbocharger system, ensuring proper function and preventing leaks of oil or exhaust gases. Its precise dimensions and material composition are critical for maintaining the integrity and efficiency of the turbocharger. Genuine OEM O-rings are manufactured to exact specifications, guaranteeing a perfect fit and reliable sealing performance, which is crucial for the longevity and performance of the turbocharger system.