Koyo aluminum racing radiator

 99-05 Mazda Miata Roadster Eunos MX5

The factory Mazda Miata radiator has plastic end tanks that become brittle with age. When new, the plastic tanks are black. When old and ready to crack,the plastic turn a brownish color. If yours is light brown to almost yellow, it's a time bomb. We recommend replacing the OEM radiator before going to the track.

Radiator cap optional