PowerBond Harmonic Balancer - 6.670" OD - Iron - Black Paint - Internal Balance - Big Block Ford AA0700AF1T63 Bolts onto 6 bolt internally

Bolts onto 6 bolt internally balanced crankshaft with 10-inch and 11

332 lb/in Spring Rate

8 AN Male O-Ring to 8 AN Male O-Ring

It features a 90mm throttle bore opening that can be ported to 105mm as needed

PowerBond Harmonic Balancer - 6.670" OD - Iron - Black Paint - Internal Balance - Big Block Ford AA0700AF1T63 Bolts onto 6 bolt internallyProduct Description: Harmonic Balancer 6. 670 in OD Iron Black Paint Internal Balance Big Block Ford Sold Individually PowerBond produces steel harmonic balancers that are designed to outperform conventional harmonic balancers without the weight penalty of many competitive balancers.