Engine radiator Koyo or Denso

I have a denso radiator on my 03 4th gen. I changed my radiator for a denso one after it started leaking 5 years ago. It's been over 50k miles and it's going strong.

I put a Denso in my ‘04 V8 about five years ago, replacing the original that had around 200k on it. No problems so far.

Koyo rad hands down best aftermarket replacement.

Have had good experiences with Denso & Koyo.

Put a few more $ in and buy a slightly more expensive one. Preferably from a bigger brand - Denso, Koyo etc. guaranteed to be better quality in most cases and fit better.

Denso is the OE for most Honda rads. I've always used them and they're good.

Denso and Koyorad are good brands.

I would recommend the koyo radiator with stock fans. It’s been 3 years with mine zero issues it’ll run cool in 120 desert.

I would recommend a full aluminum koyo radiator. There are pricy but they fit like OEM and use the OEM fans. 2 years later with 15k and no issues.

Roughly 12 months ago, I upgraded the radiator on my 2000 Series 8 (~65,000km/40,000mi) to a Koyo R1443N 48mm N-Flow. The coolant seals blew because the radiator's design allowed air to accumulate, creating hot-spots and leading to seal failure. My water temps never exceeded 90C. After a rebuild, a valve was installed on the radiator elbow, making it quicker to bleed the system, and water temps are now around 77C, about 10C cooler than before. The Koyo radiator's design prevented proper bleeding of the coolant system, causing seal failure.