I couldn't find a Koyo, so I got the Spectra off amazon. I don't have too many miles on it, but so far so good. It appears to be of good build quality. The brackets are even fairly nice (although I did opt to use the factory brackets - which still fit on the spectra). The Spectra unit is packaged better than others. The only thing I didn't like about it is how the drain petcock is designed (it is slightly different than the OEM radiator and makes a mess when draining, but that's not a huge deal).