Ford 429 460 SFI 18.1 Harmonic Balancer Fluid Damper Internal [Chrome] They are installed between the

They are installed between the water pump pulley and the drive flange

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Flat surfaces are finished with CNC machine center for accuracy and smoothness

Ford 429 460 SFI 18.1 Harmonic Balancer Fluid Damper Internal [Chrome] They are installed between theUsing only three parts a laser welded sealed housing, an internal inertia ring, and highly viscous silicone fluid between the two these SFI approved Fluid dampers can control all crankshaft vibration, not just a limited frequency range. As a result, you get reduced wear on the main bearings and timing gear, more stable valvetrain operation, and less chance of crank failure.