ESR Competition Radiators (1990-1997)


Originally built and designed by Sam Henry of Springfield Dyno. This is the latest revision to the most effective radiator in the Spec Miata marketplace. There's a reason that so many winners and champions use these radiators, they work better than anything else out there. They have been used on 6 of the last 7 national Championship winning cars.

This is a true triple pass radiator which channels the water from side to side multiple times ensuring a substantially longer cooling time in the radiator and pulling even more heat out of the cooling system. Many try to copy, but none have been nearly as effective.

Three main attributes for this radiator are:

Reduced cooling system operating temperature. We have consistently seen 20-30 degrees cooler temperatures running this new radiator vs a 54mm Koyo radiator or a few of the other copies of our radiator.

Reduced intake system air temperatures. During controlled dyno tests, we have seen 15-20 degree drops on intake air temps.

Reduced weight off the nose of the car. Compared to the Koyo, this new radiator weighs approx. 2.5lbs less when fully filled.

The simple facts are that if you keep the coolant temps below 190 degrees, you are going to make more power. Also, if the intake air temp is cooler, you will also make more power.

This is really one of the must haves if you want to make power for a whole National race distance, even tucked up in a tight draft.

    Vehicle Applications:

    • 1990-1997 Mazda Miata 1.6L & 1.8L NA6 & NA8
    SKU: ESR-200-042

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