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

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BHJ Honing Plates & Engine Builder Tooling

Blower Special 302, 5.0, 351W Ford 28oz Harmonic Damper

Available Options:

Select Second Keyway Size

  • Description
  • Inventory Details
  • Fits Ford 1968-80 302 & 351 Windsor V8
  • Blower Special with 2.065" Seal Dimension for increased strength in Hub
  • The added side load created by driving most superchargers adds a great deal of stress to the harmonic damper and crank snout (pulling on the damper). A stock-dimension small block Ford harmonic damper can split in the keyways when driving a supercharger. We increase the O.D. of the harmonic damper where it passes through the oil seal, to provide a great improvement in strength for the damper and crankshaft in this highly-stressed area. Adding the 2.065" oil seal dimension to this damper is ideal to increase strength where it is needed most.
  • Supercharger Upgrade Replacement for Ford M-6316-K351 & Equivalent*
  • Requires Larger I.D. Oil Seal (Fits Stock Timing Cover; Options Below):
     Timken 332134 (or National 332134); NAPA NOS 20520 (or SKF CR 20520)
  • OE-Style 4-Bolt Face (3.30" Bolt Circle, 2.37" Register)
  • Early & Late Style Timing Marks
  • 28oz. External Balance
  • 6.4" O.D.
  • 4.125" Overall Length (3.950" to pulley surface)
  • 8.7 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: FO-EB302HO/28-7-BSP
  • Shipping Weight: 11lbs
  • Manufactured by: BHJ Dynamics

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