HarmonicDampers.com - American Made, Professional Grade, Performance Harmonic Dampers

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BHJ Honing Plates & Engine Builder Tooling

Blower Special 401, 425 Buick Nailhead External Balance Harmonic Damper


Available Options:

Select Second Keyway Size







  • Description
  • Inventory Details
  • Fits Buick 364, 400, 401 & 425 Nail Head V8
  • Blower Special with 6-Bolt 2.80" Bolt Circle Pattern & 2" Register (* This is a different bolt pattern & register size than stock Buick 6-bolt)
  • External Balance
  • 6.7" O.D.
  • 2.7" Overall Length
  • 7.8 lbs. Gross Weight
  • Billet Steel Construction
  • SFI 18.1 Certified
  • Dual Keyways Standard: Select either 1/4", 3/16", or No Second Keyway
  • Part Number: BU-EB401NH-7-BSP
  • Shipping Weight: 10lbs
  • Manufactured by: BHJ Dynamics

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