Description Full Race Airfilter for RSV4R / Factory / APRC installation like original filter , no modifications needed only without original installationbracket . Use the included spacers for perfect fitment ___________________________________________________ The MWR Full Race Airfilter is developed on track , developed for racebikes NOT for roadbikes , not on dynometer but in real life , on track , professional racebikes with dataloggers . protection is on the same level as the performance filter & “HE” filter only for a shorter time due to the much more open structure of the foam materials. Unlike all other sportsfilters the racefilter creates a much better , equal airflow over all cylinders , means you need to adapt fueling of all cylinders seperatly to achieve maximum effect of the “HE” filter . Concerns all twins , V-twins , three , four , and V4 engines Remapping the ECU or Fuel Control Module is highly recommended.
