The Powerforce line of balancers are intended for non-SFI high performance applications. Although primarily meant for street use, these balancers are also suitable for racing applications where there is no requirement to meet SFI specifications.
It is not recommended to use these balancers in excess of 6,500RPM. Also, they are not recommended for marine or circle track applications due to excessive heat generated. While high temp elastomer is used in every balancer, certain applications are not suitable
This balancer is identical to the 80000 in every way except it has a machined area on the back of the inertia ring that provides the proper amount of imbalance to be suitable for use on externally balanced SB Chevy's. The stock 400, and most 383's as well as many stroker engines require an externally balanced balancer such as this one. Very accurately balanced.