ATI Damper 6.78in Aluminum 6/4 Groove 10% Underdrive (20102015 Chevy Camaro SS / 19992013 GM Trucks & SUVs) ATI918629
10% Underdrive Super Damper for LS Engines
The ATI 6.78-inch Aluminum Super Damper (part ATI918629) is built for 20102015 Chevy Camaro SS and 19992013 GM Trucks and SUVs running LS-based engines. Featuring a 10% underdrive ratio and a 6/4-groove dual pulley configuration, this damper delivers smoother operation, reduced accessory drag, and improved horsepower output. Crafted from billet aluminum and SFI 18.1 certified, the ATI918629 combines lightweight performance with race-proven harmonic control perfect for both daily-driven and performance LS builds.
Performance Highlights
- 6.78-inch outer diameter for compact, efficient fitment
- 10% underdrive ratio frees up horsepower by reducing accessory load
- Dual 6/4-groove pulley setup supports OEM accessories and belt alignment
- Billet aluminum construction minimizes rotational mass for faster throttle response
- Precision-balanced 2-ring internal design delivers exceptional harmonic stability
- SFI 18.1 certified for motorsport-level safety and reliability
- Fully rebuildable for long-term precision and durability
Quick Specs
- Outer Diameter: 6.78 inches
- Material: Aluminum
- Pulley Type: Dual 6/4 Groove
- Drive Ratio: 10% Underdrive
- Design: LS-Series Super Damper
- Certification: SFI 18.1
- Applications: 20102015 Camaro SS / 19992013 GM Trucks & SUVs
- Part Number: ATI918629
Why Choose ATIs 10% UD Super Damper for LS Engines?
The ATI918629 Super Damper provides a balanced combination of power and protection for LS engines. The 10% underdrive design reduces parasitic loss for better acceleration and efficiency, while ATIs dual-groove pulley system maintains accessory compatibility. Ideal for enthusiasts looking to free up power without sacrificing reliability, its a top-tier upgrade for both Camaro SS performance builds and GM truck applications.
Frequently Asked Questions
How much power can I gain from a 10% underdrive damper?
Typical gains range from 812 horsepower by reducing accessory drag and improving crankshaft efficiency.
Will this damper work with factory accessories?
Yes. The 6/4-groove pulley design ensures full compatibility with OEM belt and accessory setups.
Can I use this on both Camaro and GM truck LS engines?
Yes. It fits LS3, LS6, and LS-based truck engines across Camaro, Silverado, and SUV platforms.
Is the damper rebuildable?
Yes. Like all ATI Super Dampers, the ATI918629 is fully rebuildable to maintain long-term accuracy and performance.
Vehicle Fitment
- 2010 Chevrolet Camaro SS 6.2L LS3
- 2011 Chevrolet Camaro SS 6.2L LS3
- 2012 Chevrolet Camaro SS 6.2L LS3
- 2013 Chevrolet Camaro SS 6.2L LS3
- 2014 Chevrolet Camaro SS 6.2L LS3
- 2015 Chevrolet Camaro SS 6.2L LS3
- 1999 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2000 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2001 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2002 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2003 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2004 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2005 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2006 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2007 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2008 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2009 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2010 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2011 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2012 Chevrolet Silverado 1500 5.3L / 6.0L LS
- 2013 Chevrolet Silverado 1500 5.3L / 6.0L LS
- Also fits GM SUVs with LS engines (19992013 Tahoe, Yukon, Suburban, Escalade)
Contact Beefcake Racing
Beefcake Racing offers ATI Super Dampers and premium performance parts for LS-based vehicles. For questions or to place an order, email sales@beefcakeracing.com or call 1-855-827-7223. Our experts can help you select the right damper for your Camaro or GM truck build.
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