PRW 2530201 SFI Fluid Race Damper for 63-97 Ford 289-351W 28 oz 6.54" 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 Easy To Read Laser Engraved Timing Marks Accurate Crank Bore I.D. For Proper Pressed Fit Manufactured From Billet Carbon Steel Forgings