S&S Cycle Breather Vent Fittings Set (Vented Harley Heads, 1993-L)
According to S&S instructions sheet #51-1012 (available from the S&S web site), these fittings are used for all S&S breather bolts used on XLs 1991 and later as well as all Big Twins 1993-L.
Price indicated is for a set of two vent fittings, as shown.