A little warning with using this. If it creates any more restriction in can possible cause the air to want to find an easier path which can be through though housing halves. If using your machine in water or very dusty conditions this can cause issues. Just food for thought when changing filter shape or style. Also as a paper filter becomes dirty it can have the same effect. It is also good to lay a thin layer of grease on the filter housing halves when screwing together. This can aid in catching fine dust as well.