Use with plastic breather valves only. Small hole. Spacer set, 4-pk. Incl. .110″, .115″, .120″ and .125″ sized spacers. Used to set correct end play. Note: Steel breathers require steel breather valve spacers. Plastic breathers require plastic spacers. Do not intermix steel and plastic parts.
Fits: > 50-E77 B.T.(NU)