TEGIWA Aluminium Radiator. As you increase the power output of your 89-98 MX5 through numerous well-chosen performance enhancing mods, you need to keep a check on your engine s operating temperatures. The more you demand out of it, the higher temperatures will be, so you'd do well to invest in one of our aluminium radiators. As well as cooling your engine more efficiently (up to twice as efficient), Tegiwa radiators are also noticeably lighter than OEM units, and fit perfectly with OEM brackets and fans.