MMX Performance Replacement Panel Air Filter Set - G8X M2/ M3/ M4Allow your engine to breathe better and operate more efficiently and so improve the engines airflow, and power and fuel economy gains will follow. By removing the inevitable restrictions that the standard paper panel filters give, MMR's panel filters allow a worthwhile increase in airflow to the turbo. MMR has developed its own range of performance cotton gauze filters that easily drop into the OE airbox, which provide excellent filtration properties