2007 isx cm870... PLZ HELP

[Shaman870]

This is something that I can't understand at all and fortunately or unfortunately 530hp is very popular. As of today I am 95% sure that 8521 "out of box " can not be used on 6/6 CPL listed engines. At least it felt like that, with metallic detonation noises of my engine.
This 2 cals identical inside
AB10349.23 is 8521 (6/6 possibly)
AB10351.23 is 8518 (6/4)
reference: https://rawze.com/forums/showthread.php?...6#pid29926
For me its not important anymore after help of Rawze himself to get proper cal and parameters I wanted for my ESN, for others it could be catastrophic, could be not, I dont know...
Just wanted to bring some attention to this matter because I know in person {shop name removed} who is putting that cal into all their customers trucks no matter what based on 1 thing: its made for 6/6 by Cummins :(