still f'n around with this. The twin airs work for about 2-3 cleanings/races, then the glue that holds on the outer rear part (that says twin air) fails. They are doing the job to keep dirt dust out though. And goodness filters have gottend expensive! K&N is like $80 bucks now! The twin air is $40
Im leary of the pre-oiled filters not having enough oil/ stored a certain way for 6 months and the oil is no longer uniformly distributed.
Those durablue filters look just like Unis?