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Thats called rexnord aurora.here are pics of the chain and gear set on my 23 shredder turbo 3900. Correct part numbers according to the parts fiche. Although this is a “silent chain” which from my understanding is not as strong a HYVO. But for those of you who are suppose to have HYVO but have a different part number what chain do you have? Also the lower gear rock is not as bad as some I have seen videos of. Tki kit on the way. Not sure if I should slap it in and chance warranty issues if something were to happen. 267 miles on my sled. Adjusted chain once at 75 miles and was still solid when I took it apart. Figured I would check everything out since I’m updating the rollers on the secondary. I also have the RPM charge tube and blow off I can put on, but not sure how I feel about putting a hole in my intake socket boot.
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