They are available aftermarket with a lifetime warranty. Finish is better than an OEM fan in my opinion. I did use OEM until Spectrum came out with theirs. The Dorman unit is the wrong colour and not as nicely formed. Usually I end up changing them out on a 120k service with the age of these cars now. I had a 70 240z with the riveted metal fan that pitched a blade into the hood when I stuffed up the 2-3 shift and massively over-reved it. It actually pierced the hood and was protruding through the center of the dent.