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...

SFI 18.1 Harmonic Damper for LS1, LS2, LS3, LS6 Corvette, Pontiac G8 & Cadillac CTS-V w/Crank Bolt. Features 10 Rib drive & 10% Overdrive Pulley. This damper comes standard with 3/16″ Keyway for use with aftermarket crankshafts. Complete...

SFI 18.1 Harmonic Damper for LS1, LS2, LS3, LS6 Corvette, Pontiac G8 & Cadillac CTS-V w/Crank Bolt. Features 8 Rib drive & 10% Overdrive Pulley. Complete Corvette and CTSV Conversion Kits also available, see options below. This damper comes...

SFI 18.1 Harmonic Damper for LS1, LS2, LS3, LS6 Corvette, Pontiac G8 & Cadillac CTS-V w/Crank Bolt. Features 8 Rib drive & Std. Dia. Pulley. This damper comes standard with 3/16″ Keyway for use with aftermarket crankshafts. NOTE: Although...

SFI 18.1 Harmonic Damper for LS1, LS2, LS3, LS6 Corvette, Pontiac G8 & Cadillac CTS-V w/Crank Bolt. Features 6 Rib drive & Std. Dia. Pulley. This damper comes standard with 3/16″ Keyway for use with aftermarket crankshafts. NOTE:...

8 Rib Drive Billet Aluminum Alternator Pulley for GM Engines. 

GM 8-Rib Smooth Idler Pulley 

Innovators West GM 8 Rib Tensioner Pulley   Serpentine Rib Count 8-Rib Overall Diameter 3.250″ Serpentine Rib Diameter 3.000″ Bearing Bore Size .668″

8 Rib Drive Billet Aluminum Power Steering Pulley for Pontiac GTO w/ LS2 engine. NOTE: This pulley is the replacement for the 1st Design of 2005 LS2 GTO with a 5″ diameter power steering pulley (OEM #92218309) OEM Replacement PN: 92218309,...