Hawks Motorsports offers our clients this 840 LSX 6-Rib Harmonic Damper for Corvette, Pontiac G8 and CTS-V, Standard Diameter, Innovators West. This SFI 18.1 harmonic damper is designed for LS1, LS2, LS3 and LS6 applications using the Corvette, Pontiac G8 and Cadillac CTS-V accessory-drive configuration. It features the factory-style 6-rib drive and a standard 7.25-inch diameter pulley, keeping the original accessory-drive ratio.

If you're building an LS and want to upgrade the damper without changing the way the accessory drive behaves, this is the clean-and-simple approach. The 840 keeps the standard pulley diameter and 6-rib belt setup, so you're not changing accessory speed or chasing a different belt combination. It's a solid piece for a street car, performance build, or an LS that's getting more abuse than the stock damper was designed to handle.

The damper comes with a 3/16-inch keyway and crank bolt, and Innovators West rates it beyond the SFI 18.1 standard. A crankshaft pin kit is available for compatible stock, non-keyed Corvette crankshafts, while dual-keyway and Super Duty Blower Hub options are available for more demanding builds.

KEY FEATURES:

• Part number: 840
• Innovators West LSX harmonic damper
• 6-rib accessory drive
• Standard 7.25-inch diameter
• Designed for LS1, LS2, LS3 and LS6 applications
• Corvette, Pontiac G8 and Cadillac CTS-V applications
• SFI 18.1 harmonic damper
• 3/16-inch keyway
• Crank bolt included
• Standard hub
• Approximate weight: 8.8 lbs
• Optional crankshaft pin kit available
• Optional dual-keyway configuration available
• Optional Super Duty Blower Hub available
• Maintains standard accessory-drive ratio

FITMENT APPLICATIONS:

Chevrolet Corvette

• 1997-2004 Chevrolet Corvette C5
• 2005-2013 Chevrolet Corvette C6
• Verify exact LS engine and accessory-drive configuration

Pontiac G8

• 2008-2009 Pontiac G8
• Verify exact LS engine and accessory-drive configuration

Cadillac CTS-V

• 2004-2007 Cadillac CTS-V
• Verify exact LS engine and accessory-drive configuration

The manufacturer identifies the 840 for LS1, LS2, LS3 and LS6 Corvette, Pontiac G8 and Cadillac CTS-V applications.

INSTALLATION NOTES:

• This listing is for one Innovators West 840 harmonic damper.
• Crank bolt is included.
• Standard configuration uses a 3/16-inch keyway.
• The damper is designed for a 6-rib belt drive.
• The 7.25-inch standard diameter maintains the standard accessory-drive ratio.
• A specific Innovators West crankshaft pin kit is required when installing on a compatible stock, non-keyed crankshaft.
• The optional dual-keyway setup requires the crankshaft to be machined for a second keyway 180° from the original.
• The optional Super Duty Blower Hub is intended for high-output supercharged applications.
• Verify crankshaft snout, keyway, pulley alignment, and accessory-drive configuration before installation.
• Verify proper serpentine belt fitment after installation.
• Use the proper harmonic damper installation tool.
• Follow manufacturer installation and torque specifications.
• Verify fitment before ordering, particularly on engine swaps or modified accessory drives.

SOURCE NOTES:

• Innovators West identifies 840 as the LSX Vette/G8/CTS-V 6-rib standard-diameter harmonic damper.
• Manufacturer and supporting product documentation identify the application as LS1/LS2/LS3/LS6 Corvette, Pontiac G8 and Cadillac CTS-V.
• Published specifications list a 7.25-inch diameter and approximately 8.8-9.0 lb weight.
• The damper exceeds SFI 18.1 standards and includes a crank bolt.
• Standard damper configuration uses a 3/16-inch keyway.
• The 840 is the standard-diameter 6-rib version; 841 is the 6-rib 10% underdrive version, while 842 is the 8-rib standard-diameter version.
• Exact packaged shipping dimensions were not sufficiently verified and should be confirmed before publishing.
• No unsupported horsepower or performance claims have been added.