BMC FM481-04RACE Air Filter FM481-04RACE_AIR_BMC. BMC race filter Besides the standard version, BMC has developed another filter option. This is the “Race” filter, i. A filter that is the same shape as the standard filter, but whose filter material is designed to allow for increased airflow compared to other filter systems, while still maintaining the same filtering effect. The BMC “Race” filter was designed for those who are not satisfied with the standard performance of their motorcycle and modify the engine and ECU to achieve increased power. The “Race” filter can be identified by a yellow stripe. 1x BMC Air Filter. Product Type: Air Filter. You can send us a message by using the “Questions and answers” section towards the bottom of the page.