What part number for crank case breather/filter?

[rx1forever]

Hey guys I was wondering where you had bought or what part number/picture, there was for a breather for the crankcase, that connects to the stock air box? I am using the stock air box, and wanted to use a breather for the tube that connects to the box, how did some of you plugg the airbox? thanks for the help

 

[Mighty]

Why do you want to do that? Don't.........The airbox will evacuate the pressure better than the breather filter.......................

 

[rx1forever]

Thanks for the info Mighty!