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Fluidampr harmonic damper for Big‑Block Chevy 396–427 V8s with dual 1/4" key slots (internally balanced). The viscous damper design reduces harmful torsional vibration across the rpm range to protect internal components, reduce crankshaft failure risk and help maintain timing. Precision CNC‑machined, balanced steel finished in black zinc with engraved timing marks. SFI 18.1 certified, no maintenance required, made in USA.
Fluidampr Chevy 396-427 CID V8 w/ (2) 1/4 key slot Steel Internally Balanced Damper
