ATI Performance Products ATI918629 Super Damper Aluminum Groove Overdrive Engine Harmonic Balancer - 6.78 6 4 10% LS3

The ATI Performance Products ATI918629 is a high-performance harmonic damper engineered specifically for LS3 engines found in 2010-2015 Camaro applications, as well as Gen 3 Vortec truck engines, SSR, and TrailBlazer platforms. This precision-machined aluminum damper features a 6.78-inch diameter design that provides superior crankshaft protection and harmonics control at high RPM.

Key Features:

• 6.78-inch diameter aluminum construction for reduced rotating weight
• Dual belt configuration with 6-groove and 4-groove serpentine pulley design
• 10% underdrive ratio reduces parasitic drag on accessories for increased horsepower
• ATI Super Damper technology with elastomer bonding for superior vibration dampening
• Direct replacement for LS3 Camaro (2010-2015), Gen 3 Vortec truck, SSR, and TrailBlazer applications
• Precision-balanced for smooth operation and extended engine life
• Race-proven design suitable for street and competition use

ATI's Super Damper line represents the gold standard in harmonic balancers, utilizing a unique elastomer and inertia ring design that absorbs crankshaft vibrations across the entire RPM range. The 10% underdrive configuration frees up valuable horsepower by reducing the load on alternator, water pump, and other belt-driven accessories. The lightweight aluminum construction reduces rotational mass while maintaining the structural integrity needed for high-performance applications.

This damper is ideal for enthusiasts building or upgrading LS-based engines who demand maximum performance and reliability. Professional installation is recommended, and proper belt sizing for underdrive applications should be verified during installation.