1990-1993 Mazda Miata MX5 1.6L L4. 1994-1997 Mazda Miata MX5 1.8L L4. This aluminum radiator is designed to provide maximum cooling efficiency to prevent premature engine failure. Its light-weight, and high-heat transferring aluminum features a tube and fin design that, dramatically increases surface area that enables the heat to dissipate more efficiently.