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

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BHJ Honing Plates & Engine Builder Tooling

Blower Special 7" SB Chevrolet Harmonic Damper


$550.00

Available Options:

Select Second Keyway Size






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  • Description
  • Inventory Details
  • Fits Chevy Small Block V8
  • 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 Chevy harmonic damper can split in the keyways when driving a supercharger. Increasing the O.D. of the harmonic damper where it passes through the oil seal provides a great improvement in strength for the damper and crankshaft. Adding the big block Chevy oil seal dimension to this damper is ideal to increase strength where it is needed most.
  • Blower Special with Dual Bolt Pattern, 6-Bolt 2.80" Bolt Circle Pattern & Chevy Small Block 3-Bolt Face with 2" Register
  • Chevy Big Block Front Oil Seal Dimension
  • Use with BHJ Chevy Small Block Timing Cover with Big Block Chevy Seal Housing, sold separately.
  • Internal Balance
  • 6.7" O.D.
  • 2.49" Overall Length
  • 0.975" Timing Gear Surface to Rear of Inertia Ring
  • 6.8 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: CH-IBS-7-BSP
  • Shipping Weight: 8.6lbs
  • Manufactured by: BHJ Dynamics


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