I rate Champion Cooling very highly. Here's why:
I bought one of their 4-core aluminum radiators for Big Blue in October of 2020. It fit nicely and worked well, but unfortunately it started leaking. I tried to contact Stay Cool, the distributor that fulfilled the order I placed with Amazon, but couldn't as their phone numbers were "Out of service". I contacted Amazon who sent a note to Stay Cool on April 29th, and Stay Cool replied the same day with "These radiators have a life time warranty. We can ship a new one to replace the defective unit. Thank you." But I replied to them asking when it will ship and as of today, 8 days later, I've not gotten a reply nor a radiator from them.
Given that and the fact that the MC1451 shows as out of stock, I called Champion and Cara answered. I told her my tale of woe and she apologized. Then she looked up my order and was able to find it in their system. However, the 4-row MC1451 radiator was out of stock and they didn't know when it would be available.
But Cara asked me to give her some time and went away to scour all of their distributors - to no avail. Then she turned to the warehouse and was able to fine one, and one only, MC1451. And it arrived here today!
Gary, AKA "Gary fellow":
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI