Precise boost control is vital for extracting maximum power and reliability from the N55 turbocharger. Prevent boost leaks and ensure rapid pressure holding between manual gear changes or 7-speed M-DCT dual-clutch shifts by upgrading to high-performance Turbo Dump Valves, also known as diverter valves, or recirc/recirculation valves, keeping your forced induction system operating with crisp throttle response under high boost pressure.