S55 Performance Air Intake For BMW M2C, M3, M4 - ARM MotorsportsWhen we set out to develop the ARM F80 intake system we wanted to create an intake system for the S55 engine that would support the most advanced builds by removing any potential bottleneck in the induction system. Consequently, we developed the best intake available for the S55 engine. The focus of the ARM S55 Intake is performance, period. We're not here to offer fancy pipes that look better than the stock intake but perform the same, or worse. Our