I am looking into replacing my stock 140K mile harmonic balancer and was wondering about SFI rated balancers. If I have no plans of revving the motor past 6000 rpms, would I even benefit from an SFI approved balancer? I've read a few posts stating SFI balancers work best above 6500 rpms. Also, I noticed a lot of people recommend Powerbond units but when they receive them they say Pioneer on them. I found a non SFI Pioneer balancer at Advanced Auto for $59.98 (part # DA3021), is that the same as a non SFI Powerbond unit? Anybody have one? I want to get one with the elastomer bonded to the metal unlike the stock one, but like everyone else I don't want to waste money.