Both of ya'll are missing the point. If its still popping back when he puts that hi dollar HB on, all he is gonna do then is break a 300.00 HB or something else instead of a 50.00 hub. the HB is not making it pop back. It may or may not help save the bearings in the long run, but its not gonna do anything for the popping back. that's what's breaking the hubs. if they were nessary BDS would be trying to sell one to everybody that ever owned a blower, and they don't. if its was nessary they would sell one with the kits. i'm gonna say it dont do nothing one way or another. i'm talking 3" belts, never run any thing else.