I got a Koyorad and 0 issues with overheating with hard driving! Coolant stays at operating temp no matter what.
Pros: no issues with overheating
Reviews of KOYORAD parts For Business
Average Rating
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The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
2.8
Manufacturer Ranking
#185
42
Spare Parts
2
Country
Japan
Website
koyorad.co.jp
Spare Parts
Comparisons
koyorad on my 400hp Focus and never had over heating issues.
Pros: no over heating issues
Vehicle:
Ford Focus
I replaced my 2010 factory Calsonic with a Kyorad 2807, there were lots of favorable comments on thenewx forum. 18 months later, still going.
Pros: still going after months
Vehicle:
Nissan
Part number: 2807
I had read about people having good luck with the Kyorad brand so that's what I bought.
Pros: good luck with brand
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.
Pros: keeps temps cooler
Vehicle:
Mazda
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.
Pros: engine can breath
Cons: noise maker
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
Pros: aluminum radiator, good price
Vehicle:
Porsche
The radiator you could go OEM or NVA, but Koyorad is proven solid also.
Pros: proven solid
Vehicle:
Nissan
I went with a Koyorad, but for how much I’ve spent, I should have gone with a crossflow (either Supermiata or Flyin Miata). I also did a coolant reroute, which made me really regret not getting a crossflow
Cons: regret not getting crossflow, perceived poor value
The cap which came on the Koyorad is probably a two way cap. If so it needs to be replaced with a Subaru one way cap.
Cons: wrong cap type, needs replacement
Vehicle:
Subaru
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Owner reviews of KOYORAD products
The KOYORAD brand is registered in Japan. Official website: http://www.koyorad.co.jp/ .
In March 2026, PartReview recorded 42 reviews across 2 parts by KOYORAD. Average rating — 2.8 out of 5.
KOYORAD is in the PartReview manufacturers ranking, currently at position 185. Over the last 30 days it dropped by 0 points.
Popular KOYORAD parts
The most popular KOYORAD products on PartReview:
- Engine radiator KOYORAD - 41 review. PR Score — 94, average rating — 4.5.
- Radiator cap KOYORAD - 1 review. PR Score — not available yet, average rating — 1.
Most owner reviews about KOYORAD parts are collected on these pages.
Top-rated KOYORAD parts
KOYORAD achieved top positions in these PartReview part rankings:
- Best engine radiator — ranked 2 among 9 manufacturers. Received 1069 votes.
Comparisons of KOYORAD parts
The most interesting comparisons of KOYORAD with other manufacturers help you see which is better: