The MMX Cotton Panel Air Filter is a simple, power-boosting upgrade for S55-powered BMWs, covering F8x and F1x M2 Competition, M3, M4, M5 and M6 models. It's one of the easiest ways to improve the breathing of the 3.0-litre S55 straight-six.
It's a direct drop-in replacement for the factory panel filter, fitting in around 10 minutes with no permanent modification, and can be returned to the standard filter at any time. Fully washable and reusable.
