Thermostat w/o Gasket is a direct fit for the following:

1990-1994 323
1988-1992 626
1990-1993 B2200
1990-1993 B2600
1990-1993 Mazda Miata
1993-1995 Mazda MPV 2.6L
1992-1993 Mazda MX-3 1.6L
1988-1992 Mazda MX-6
1990-1994 Protege
1995 323S
1995 ProtegeS

Genuine Mazda Part Number: 8AK1-15-171-9U