SBF 6-5/8'' HARMONIC
Harmonic Balancer, Internal Balance, Steel, Black, Ford/Mercury, Small Block.
Using only three parts--a laser-welded sealed housing, an internal inertia ring, and highly viscous silicone fluid between the two--these SFI-approved Fluidamprs 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.
Notes:Additional timing/degree marks at 90, 180, and 270 degrees. Designed for 3 bolt SVO applications only.