Shelby Killer Performance was started in 2015 by David an avid performance car enthusiast. Shelby Killer Performance specializes in LSX and 5th gen LT performance parts and accessories. With a five star rating our ultimate passion is making the customer happy.

2016 Shelby KillerPerformance LLC

SFI 18.1 Harmonic Damper for GM 2006-2013 LS7 Corvette w/Crank Bolt. Features 10 Rib drive & 10% Overdrive Pulley. Complete 10 Rib Conversion Kits also available, see options below.


  • Diameter: 8.00"
  • Weight: 9.8 lbs
  • Exceeds SFI 18.1 standards and is marked on front with SFI Sticker, and on the rear with SFI number stamped into unit.

Innovators West - 10 Rib Harmonic Balancer 10% OD - C6 Corvette Z06 LS7