Replacement Miata radiators come in both stock thickness and several thicker higher performance versions. Our stock replacement Miata radiators have plastic end tanks like the factory Miata radiator. Our PWR and Koyo high performance 37 and 55 millimeter Miata radiators are longer lasting and higher performance all aluminum radiators with up to three times the capacity of the stock Miata radiator. If you have questions about which radiator is right for your Miata, please email or give us a call.