The S3 sintered compound is optimal for street bikes, dual sport, touring, cruisers. It's recommended on applications with rather larger engines or for people who ride harder than average and want the great stopping power of a sintered brake pad. Fits: Kawasaki GPZ1100 UNI TRACK 1983 GPZ550S 1982-1983 GPZ750 R1 TWIN SHOCK 1982 GT750 1982-1985 KZ1000 J 1981-1983 KZ1100 A/D/L 1981-1983 Z1000R LAWSON REPLICA 1982-1983 Z1000ST 1979-1980 Z1100 1981-1983 Z250A 1981-1982 Z440 1981-1983 Z440A LTD 1983 Z440D LTD 1982-1984 Z500 1981-1982 Z550 1982-1990 Z650D 1981 Z650F 1981-1983 Z750 1982-1988 Z750E 1980 Z750H LTD 1980-1981 Z750L 1981-1982 Z750S 1982-1983