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Found a great thread on Denso & Spectra radiators. From my brief reading of the thread, my guess is the Denso radiator has better cooling/thermal transfer performance for both engine coolant and transmission fluid. However, the Spectra appears to have a more reliable transmission cooler construction. (This is assuming those companies use that same design for their 100 series radiators).
If somebody has an old T-Rad radiator sitting around, I'd be interested in seeing one cut apart. I know a couple have received replacement T-Rad radiators that leaked upon install. It easier to fix leaks at the end tanks than anything internal. I'm surprised any radiator would leave a factory without being pressure tested. I wonder if said radiators were damaged during shipping.
Radiator comparison: Denso/Spectra/OSC - Honda Ridgeline Owners Club Forums
If truly built in Canada and thicker I'd be swayed in that direction. I'd try it out.
But keep in mind, Denso is one of our most reliable line of other OEM products in the 100's.

Denso is made in Taiwan.

Denso may be one of the best replacement, but is not OEM. See post #35:Due to a dealership repair by the PO where the tranny oil college inlet nipple was smashed, brand new Denso radiator for the LX. Way cheaper than the OEM, which is also a Denso![]()
OK, new radiator is in.
Went with the Spectra instead of the Denso. It was an exact fit. Identical (visually) to the OEM I took out. Everything in the right place, dropped right in, bolted right up. Just need to go test drive it.
Spectra (CU2282) for 99 LX 470.
Mishimoto makes a good product, I used one of their coolers on a previous vehicle and their customer service was great when my kit was shipped with missing pieces. I’ll be adding this to my list...Has anyone used a Mishimoto Radiator?
They’re about $260 on amazon. Lifetime warranty, don’t know how it compares to oem.
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Mishimoto makes a good product, I used one of their coolers on a previous vehicle and their customer service was great when my kit was shipped with missing pieces. I’ll be adding this to my list...