They cant do anything except a boil and flush, these radiators have dimpled tubes and the age old practice of "rodding" them out will not work. Almost all the radiators are now made in thailand, india or mexico. So shop around and make damn sure you get a 4 row if you go original, the 3 row makes heat while towing, and you can ask how I know this if you need to. Also they fit 85 to97 I believe. I took mine out of a 97 f450. Maybe even newer.