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SuperMiata SPMCFRAD31
Supermiata Crossflow Radiator MX5 Miata 90-05
Price: $349.00
Pre-Order for estimated September 28 ship date

Detailed Description

Crossflow Radiator
Fita all Miata Roadster Eunos MX5 
Will not fit Mazdaspeed MX5, interferes with Mazdaspeed MX5 OEM intake tubing

More race wins, lap records and national champisonships than any other Miata radiator in the world. Simply the proven best.

Why crossflow?
The Crossflow utilizes a side to side coolant flow pattern. The OEM and most aftermarket radiators have a downflow top and bottom tank configuration. The primary advantage of a crossflow is the longer transverse coolant path allows more time to shed heat.  Placing the filler on the low pressure side also prevents the cap from releasing pressure prematurely as it can in traditional top/bottm tank designs. The core also features carefully optimzed fin density and thickness to allow the maximum cooling in the most compact and lightweight radiator. This lightweight 31mm core will cool more efficiently than the Koyo 55mm once offered and weighs about 40% less.

When combined with our Qmax coolant reroute, the B series 89-05 Miata can handle 3x the OEM power and stay cool

* Use this top hose if you do not have a Coolant Reroute 



Starting with a clean sheet of paper, we were able to include the features of the best radiators on the market and add a few of our own.

-Two drain plugs. Each drain plug is a common 10x1.5 bolt with a simple o-ring. Lose a plug? 10 minutes at your local auto parts or hardware store and you are back in business.

-High flow fill neck. Nothing more anoying that bleeding a cooling system that has a tiny filler neck that requires a funnel and slo-mo filling. 

-High pressure 1.4 bar (20psi), high temp cap. The standard cap with our radiator will allow your system to operate at 25% higher system pressure. That raises the boiling point even further. The seal is high temp silicone, not rubber that will crack and leak.

-B tube core. The B tube is actually two tubes in one. The B tube has a septum, or divider that runs down the center of each tube. This increases the surface area and help to equalize the wall pressures inside the tube to further optimizing cooling efficiency. Our core is one continuous tube, not two cores sandwiched like you might see in other large capacity cores. This means maximum surface area with minimal external size/weight.

-High fin density. Our core is 19.5 fpi, or fins per inch. Our testing has shown that 18-21 fpi is the sweet spot given the airflow, temp deltas and water pressure of  Miata system.

-Compact 6.5mm fin height increase coolant to core contact area

-Convertible. Our radiator will fit any year 89-05 MX5 Miata with included hardware. 

-Light weight design. 7.8 lbs, the lightest aftermarket aluminum radiator available

Why replace the stock radiator?
 When old and ready to crack, the plastic turns 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.

Suitable for any power output from stock to the most heavily taxed 300whp turbo track Miatas running factory A/C.

Pair with our Coolant Reroute kit for the maximum cooling efficiency in your Miata.

Want to learn more about Miata cooling systems? CLICK HERE

Drain plugs and radiator cap included

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