Miata KOYO Radiator 37mm V1139 ALL Aluminum :: 90-97

We asked KOYO to make a unit slightly thinner Miata radiator than their monster 55m and this is it. The larger 55mm Koyo Miata radiator is plug and play with all factory hardware but pushes the factory fan housing back enough that they need to be trimmed to fit with LARGER aftermarket sway bars.

But this 37mm Miata radiator fits with all OEM hardware and thicker aftermarket sway bars without having to trim the fan housings. Also very popular with the spec Miata racers because it cures most overheating issues without adding quite as much water weight as the 55mm core.

All aluminum and incredible craftsmanship (not the simple massive fining and large cross tube styles you see on some cheap alumimnum Miata radiators which work fine at low speeds but do not cool well at high speeds).

This Miata radiator will give your Miata many years of quality service. Intended for manual transmission only. Includes factory style drain plug, does NOT include cap but takes the factory cap.