PRW 2545401 SFI Fluid Race Damper for 70-90 Chevy 454 Ext Bal 8.00" OD

PQx SFI-Rated Racing FluidGel Damper These dampers are made with an internal steel inertia ring that is surrounded by a high viscosity silicone gel. The inertia ring floats in the silicone get to combat the engine harmonics at all RPM ranges. External balance applications feature a removable Meets SFI 18.1 Specification Easy To Read Laser Engraved Timing Marks Accurate Crank Bore For Proper Pressed Fit Manufactured From Billet Carbon Steel Forgings