Fluidampr SBC Ext Balanced Dual (3/16in & 3/16in) Keyway Harmonic Balancer Adapter Hub (Hub Only)

Repeat damper removal and installation can reduce vibration control. Maintain recommended Fluidampr press fit of 0.0005" - 0.0015". Fits Fluidampr #720111. Chevy 400ci, external balance, dual keys (3/16" and 3/16").