Hawks Motorsports offers our clients this 864 1999-2013 GM LS Truck, 2006-2008 Trailblazer SS & 2010-2015 Camaro 10-Rib 10% Overdrive Harmonic Damper, SFI 18.1, Innovators West. This performance harmonic damper is designed for compatible LS-powered GM trucks, Trailblazer SS models, and Gen 5 Camaro applications and features a 10-rib, 10% overdrive pulley.

When you're making real power with an LS and hanging a blower off the front of it, belt control becomes a big deal. The 10-rib setup gives the belt plenty of bite, while the 10% overdrive gets the crank-driven side of the system moving faster and can help spin an aftermarket supercharger harder. This is the kind of damper that makes sense on a serious street build or a truck that gets driven like it owes you money.

The 864 measures 8.125 inches in diameter, weighs approximately 11.4 lbs, and comes with a single 3/16-inch keyway. It exceeds SFI 18.1 standards and includes the crank bolt. Innovators West also offers a Super Duty Blower Hub option for high-power supercharged combinations.

KEY FEATURES:

• Part number: 864
• Innovators West performance harmonic damper
• 10-rib accessory-drive configuration
• 10% overdrive
• 8.125-inch diameter
• Approximately 11.4 lbs
• SFI 18.1 compliant
• Single 3/16-inch keyway
• Crank bolt included
• Designed for aftermarket supercharger applications
• Super Duty Blower Hub option available
• Optional double 3/16-inch keyway available
• Compatible with complete 10-rib conversion systems

FITMENT APPLICATIONS:

GM LS Trucks

• 1999-2013 GM LS-powered trucks
• 4.8L, 5.3L, 6.0L and 6.2L LS applications, where compatible with the accessory drive

Chevrolet Trailblazer SS

• 2006 Chevrolet Trailblazer SS — 6.0L LS2
• 2007 Chevrolet Trailblazer SS — 6.0L LS2
• 2008 Chevrolet Trailblazer SS — 6.0L LS2

Chevrolet Camaro

• 2010 Chevrolet Camaro
• 2011 Chevrolet Camaro
• 2012 Chevrolet Camaro
• 2013 Chevrolet Camaro
• 2014 Chevrolet Camaro
• 2015 Chevrolet Camaro

Important: Verify the engine, accessory-drive configuration, belt count, crankshaft configuration, and available clearance before ordering.

INSTALLATION NOTES:

• This listing is for one 864 harmonic damper with crank bolt.
• Verify the vehicle and engine application before ordering.
• Designed around a 10-rib accessory drive.
• The 10% overdrive increases crank-driven accessory and supercharger speed.
• Verify belt length and routing with the 10% overdrive pulley.
• The damper uses a single 3/16-inch keyway.
• The optional Innovators West #968 crankshaft pin kit is designed specifically for Innovators West dampers and is available separately.
• An additional 3/16-inch keyway is available, but adding one requires the crankshaft to be machined for the second keyway 180 degrees from the original.
• The optional Super Duty Blower Hub is intended for high-power supercharged applications of approximately 750 RWHP and greater and includes a custom timing-cover seal.
• Verify pulley alignment across the complete accessory drive.
• Inspect the crankshaft snout and keyway before installation.
• Follow the manufacturer's installation and torque specifications.
• Verify fuel, cooling, belt-drive and calibration requirements when increasing supercharger speed.
• Do not modify or permanently install the damper until fitment has been confirmed.