The hose that you are holding There exists the valve cover ventilation and will be still left open. Putting a filter on It could be intelligent to circumvent dust or debris getting into your cylinderhead... I hope I don't need to say that you simply measure this Together with the https://toyota4ageblacktopenginef45766.blogzet.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-blacktop-4age-47347424