2. If a PVC or breather is to be used ,the knock out plug should be removed from the cover by tapping the knockout the center with a hammer and punch.The hole can then be cleaned up with a round file. Leave a small amount of the ridge or lip in the hole to retain the grommet (file the hole size to approximately 950'- .980"diameter) Be sure to
clean all metal filings and pieces of aluminum out of the cover before installing of th me cover. Use grommets (P5007921) when these PVC or baffles reused use with .750" diameter PVC or Breather lt is also suggested that extra baffles (P5007052) be added to the cover under the PVC or breather. The PVC breather grommet and extra baffles are not included with the valve cover set, but can be ordered separately.

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