I got a Koyorad and 0 issues with overheating with hard driving! Coolant stays at operating temp no matter what.
koyorad on my 400hp Focus and never had over heating issues.
I replaced my 2010 factory Calsonic with a Kyorad 2807, there were lots of favorable comments on thenewx forum. 18 months later, still going.
I had read about people having good luck with the Kyorad brand so that's what I bought.
On my Miata with the factory flawed OEM coolant routing, I run a Koyorad 36mm aluminum radiator with OEM fans and it keeps temps a bit cooler than stock.
I changed out the intake (noise maker but I love it) then everything that connects so the turbo inlet and bpv, charge pipe and a bigger tmic. A engine that can breath will be healthy.
This specific spot fails on almost every subaru radiator i have worked on.
If you are lucky KoyoRad still has their sale going, I just got an aluminum radiator from my 97 legacy for $180
Wedged the GTI's radiator in. I was pretty worried about the Nissen OE equivalent I bought on FCP euro being enough for the VR6.
Nissens is ok
The ~2014 Nissens, with the 15 round tube design just doesn't cut it. From what I can tell the car would've come with the 30 flat tube design. The Nissens just doesn't have enough surface area. On a hot day, with the AC going and highway speeds it just couldn't keep up.
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If choosing engine radiator across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.
We compare engine radiator across these categories:
In March 2026 on PartReview, engine radiator KOYORAD and Nissens were roughly equal.
In March 2026 on PartReview, engine radiator KOYORAD were overall more popular than KOYORAD.
The brands are equal by vote balance:
By number of reviews, engine radiator Nissens surpassed KOYORAD:
In March 2026, according to PartReview, engine radiator Nissens led more car-specific ratings than KOYORAD:
Nissens are chosen by owners of cars such as: Volkswagen Golf, and others.
Engine radiator KOYORAD have not yet taken leading positions in car-specific ratings. You can help by adding a review and specifying your car.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of engine radiator Nissens with: MISHIMOTO, Koyo, Denso, OEM Volkswagen, OEM BMW, VALEO, OEM Toyota.
Also available: comparisons of engine radiator KOYORAD with: MISHIMOTO, Koyo, Denso, OEM Volkswagen, OEM BMW, VALEO, OEM Toyota.
You can also see who is better among other engine radiator manufacturers: MISHIMOTO or Koyo, MISHIMOTO or Nissens, MISHIMOTO or KOYORAD, MISHIMOTO or Denso, MISHIMOTO or OEM Volkswagen.
