Question: what is the difference between bmw n54 and n55?
Answer: Arguably, the most significant difference between the N54 and N55 is the turbochargers; the N54 bolsters true twin turbochargers while its N55 counterpart carries a single twin-scroll turbocharger. A twin-scroll turbocharger is a single turbo where the exhaust housing of the turbocharger is split into 2 “scrolls”.