AlphaMoto Four 42MM Oval POD AIR FILTERS FILTER KAWASAKI Z1 KZ900 KZ1000 GPZ1100 KZ 900 GS1000 GS750 The listing is for Four 42mm (1.6535inches) airfilters will work for Kawasaki 1983-1984 GPZ1100, 1977-1980 KZ1000LTD, 1978-1981 KZ1000 POLICE will work for kawasaki 1977-1980 KZ1000A,1978 KZ1000D,1979-1980 KZ1000E, 1976-1977 KZ900A,1976 KZ900B LTD,1973-1975 Z1 900 suzuki 1978-1979 GS1000, 1978-1980 GS1000E etc