Engine radiator VALEO or KOYORAD

My all aluminum Koyorad radiator is a far superior unit than the factory original.

I run the Koyorad 38mm radiator on my NB, with just regular Prestone green concentrate and distilled water 50/50, and OEM Mazda cap and thermostat. Coolant temps stay in the 190's at all times. It very rarely gets above 200 except on the hottest summer days, usually when sitting in traffic.

I placed the thicker koyorad in there and fixed a lot of issues, together with hood vents helped me getting my drift car cool.

I have the koyorad myself, bought it used. Spend some time sealing the nose to force all air through the radiator and you'll never have an overheating issue naturally aspirated.

Koyorad. Their fit and finish is OEM level.

One of the best replacement radiators for sure but you’ll have to get an external transmission cooler for it to work as the Koyorad doesn’t have an integrated transmission cooler that autos use.

i went with a Koyorad SKU: 910-371 for my NB from Moss. I live in hot sunny florida, and took it to the track a few times. never an issue. i just drove it hard to the hardware store.

My NA 1.4 OE failed (long time ago) because of aluminium tubing corrosion (brine). So replacement Valeo got paint treatment . So far 100k km without problems.

Koyorad Aluminum radiator (upgrade): $380 If you got those two parts, it’d save a bulk of the money.

My 95 got an aluminum tank Koyorad last month. These aluminum cylinder heads warp too easily to be messing around with cheaper options.