DescriptionTwin Air dual-stage filters are the choice of top factory teams and riders worldwide.Dual-bonded foam design filters out even the smallest dirt particles, while allowing more airflow than two separate layer filters (flow bench proven).Flat foam sealing ring provides a secure seat against the airbox, even in the worst riding conditions.Twin Air filters are slightly smaller than stock, making them easier to change while increasing dead air space around the filter for better performance.This item fits the following vehicle applications:compatible with Beta 250 RR 2013-2017compatible with Beta 300 RR 2013-2017compatible with Beta 350 RR 2013-2014compatible with Beta 350 RR EFI 2015-2016compatible with Beta 350 RR Race Edition 2018compatible with Beta 390 RR 2015-2016compatible with Beta 390 RR Race Edition 2018compatible with Beta 400 RR 2013-2014compatible with Beta 430 RR 2015-2016compatible with Beta 430 RR Race Edition 2018compatible with Beta 430 RS 2015-2016compatible with Beta 450 RR 2013-2014compatible with Beta 480 RR 2015-2016compatible with Beta 480 RR Race Edition 2018compatible with Beta 498 RR 2013-2014compatible with Beta 500 RS 2015-2016