KYOSTAR Cold Air Intake System for BMW S63TU4 / N63T3 4.4L Twin-Turbo V8 Upgrade your BMW 4.4L twin-turbo V8 with the KYOSTAR Cold Air Intake System. Designed for selected BMW M5, M8, M550i, M850i, and 750i models, this intake system helps reduce airflow restriction while supporting sharper throttle response, improved turbo airflow delivery, and a more aggressive induction sound. The high-flow dual-intake design replaces restrictive factory intake components and helps provide