Fluidampr internally balanced adapter hub for SBF Ford applications, single keyway configuration intended for 302/351/400 engines. This hub-only piece fits Fluidampr part #650231 and is provided to maintain correct balance when replacing or servicing dampers. The product notes the importance of preserving the recommended press fit tolerance of 0.0005"–0.0015" to avoid vibration control loss.
Fluidampr SBF Internally Balanced Single Keyway Harmonic Balancer Adapter Hub (Hub Only)