HARLEY Oversize Timing Plug and Tap Fits 1936-1940 EL, 1938-1948 UL, 1941-1984 FL, 1957-1985 X

Acorn style plug with oversize thread size and one tap for rethreading stripped 5/8 inch-18 timing plug holes. Fits all timing holes. This plug kit is for use to re-tap worn or stripped 5/8 inch-18 thread timing plug holes into 11/16 inch-16 thread timing plug holes for use of the oversized plug.Cases would have to be disassembled in order to use this kit. This will not ever allow the use of a stock plug. FITS HARLEY: 1936-1940 EL, 1938-1948 UL, 1941-1984 FL, 1957-1985 XL, 1971-1984 FX, 1984-1999 FXST, 1986-1999 FLST, 1991-1999 FXD, 1979-1999 FLT, 1979-1999 FLT, 1982-1994 FXR, 1982-1994 FXR,