Crankcase breather
this is the type i have used

autozone Part Number: 4281 Spectre/Chrome plated steel twist-in valve cover breather - May not be legal for use on pollution controlled vehicles (4281) | Breather Cap | AutoZone.com
advance auto parts part number: 4281 Buy Spectre Breather Cap Oil Filler Twist-On Chrome 4281 at Advance Auto Parts
oreilly Mr. Gasket - V/C Breather Part # 2061 Mr. Gasket 2061 - V/C Breather | O'Reilly Auto Parts

autozone Part Number: 4281 Spectre/Chrome plated steel twist-in valve cover breather - May not be legal for use on pollution controlled vehicles (4281) | Breather Cap | AutoZone.com
advance auto parts part number: 4281 Buy Spectre Breather Cap Oil Filler Twist-On Chrome 4281 at Advance Auto Parts
oreilly Mr. Gasket - V/C Breather Part # 2061 Mr. Gasket 2061 - V/C Breather | O'Reilly Auto Parts
My aftermarket air filter has a delete where I can hook up the original pipe, but I haven't put it on yet. Right now, the oil cap itself has a filter in it, much like the one pictured above. It works nicely.
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aedinius
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