SBC 6.75 Inch Harmonic Damper 6 Bolt (Dual) Pattern & Big Block Snout
6.75 inch SBC Harmonic Racing Damper 6-bolt & Big Block Crank Snout 6.75 inch SBC Harmonic Racing Damper 6-bolt & Big Block Crank Snout SBC Crank Trigger Kit Option

SBC 6.75 Inch Harmonic Damper
w/ BBC Crank Snout

Part# 107B
Only $415.00
Commonly used in N/A applications, this SFI 18.1 Approved Balancer is designed for high RPM applications where damper weight is a concern. This damper is designed for use with crankshafts that have the BBC dimension crank snout.  For high hp supercharged cars we reccomend using the 7" #109 Super Duty Damper.


  • Flying Magnet Crank Trigger Option - Add $100.00
    Get rid of your separate Crank Trigger Wheel by integrating it into the Damper itself! - Saves on average about 9 Ounces over the MSD Crank Trigger Wheel.
  • Crank Trigger Bracket Option - Add $136.00
    SBC Crank Trigger Kit OptionBolt on a matching billet aluminum sensor bracket and mounting hardware with passenger (std) side mounting.
  • Crank Trigger Sensor Option - Add $65.00
    3/4-16 UNF Flying Magnet Crank Trigger Sensor - Direct Replacement for MSD #8276. Designed to work with Integrated IW Flying Magnet Balancer Option and Brackets.
  • Dual Keyway Option - Add $20.00
    Add dual keyways for Supercharged or Extreme Duty Applications. Requires double keyed crankshaft snout.


  • Outer Diameter: 6.75"
  • Weight: 7.5 lbs
  • Pulley Pattern: 6 Bolt GM
  • Big Block Crank Snout
  • Exceeds SFI 18.1 standards and is marked on front with SFI Sticker, and on the rear with SFI number stamped into unit.