This Gates belt out performs the other belts I have used. In my IDI 7.3, with proper tension, it's common for the belts to have vertical movement when running. I switched to the Gates belts and have eliminated that jump. The Gates HD belts are even better. Make sure you have the proper cross reference #'s and know the length and width of the OEM belt. These belts are outstanding. There might be other good belts out there, but I'm done looking at this time. Very Good Belt. No Bad side yet.