Balancers are designed to self adjust to dampen rotation wobbles that occur with all engines. To a point that is. Balancing a motor assures you are within a balancer's performance threshold. Aftermarket performance balancers have tighter tolerance and thus tighter harmonic vibration curve at higher RPMs. I have never had any issues with Mopar Performance balancers. ATI is the leader in aftermarket balancers that I've seen.
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