If your experiencing oil blow by problems these baffled breather grommets could be the answer. Each grommet features an integral baffling for oil while still providing adequate engine breathing and venting.
These oil resistant rubber grommets are used to seal breathers and caps in all popular valve covers. 1-1/4" hole, for 1" breathers. Cut breather hole to preference. Can also be used as a breather hole plug.