SFI 18.1 Harmonic Damper for GM 2006-2013 LS7 Corvette w/Crank Bolt. Features 8 Rib drive & Std. Dia. Pulley. NOTE: Although this damper is designed with 8 belt grooves, it may be used with the stock 6-rib accessory drive with no issues...

SFI 18.1 Harmonic Balancer for GM 2006-2013 LS7 Corvette w/Crank Bolt. Features 6 Rib drive & Std. Dia. Pulley. This damper comes standard with 3/16″ Keyway for use with aftermarket crankshafts. Diameter: 7.25″ Weight: 7.4 lbs Comes...

8 Rib Drive Conversion Kit with 10% Overdrive Damper for LS1, LS2, LS3, LS6 Corvette – Includes SFI 18.1 Harmonic Damper. NOTE: The Super Duty Blower Hub option is a thicker hub that provides greater resistance to hub cracking under high power...

8 Rib Drive Conversion Kit with Standard Diameter Damper for LS1, LS2, LS3, LS6 Corvette – Includes SFI 18.1 Harmonic Damper. NOTE: The Super Duty Blower Hub option is a thicker hub that provides greater resistance to hub cracking under high...

Harmonic Balancer/Underdrive Pulley, 1997-13 LS1/LS6/LS2/LS3 Corvette/2008-09 L76 Pontiac G8 GT/2009 GXP w/Bolt  The PowerBond race series brings the advantages of bonded balancers to high revving and high horsepower street/race applications where...