Fluidampr BBC Ext Balanced Dual (1/4in & 1/4in) 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 #800121 and #80253E. Chevy 454-502ci, external balance, dual keys (1/4" and 1/4").