Part Number: 9960-1 Application: 1936-1940 EL1938-1948 UL1941-1984 FL1957-1985 XL1971-1984 FX1984-1999 FXST1986-1999 FLST1991-1999 FXD1979-1999 FLT Details:Chrome allen timing plug is 11/16 - 16 oversize. UOM: EA Country of Origin: USA