LS Harmonic Balancer 5.67 25% UD GM Y-Body

The LS Harmonic Balancer 5.67 25% UD GM Y-Body by ATI Performance is designed for LS engine builders and street enthusiasts who require effective crankshaft dampening and improved ignition timing accuracy. This balancer acts as a vital connection between the engine's rotating assembly and the accessory drive system, influencing belt tension stability and overall drivetrain longevity.

Featuring a 5.67-inch diameter and a 25% underdrive ratio, this harmonic balancer reduces parasitic load on the engine by slowing accessory drive speeds relative to crankshaft rotation. The dual-ring elastomer dampening system effectively isolates torsional oscillations across the RPM spectrum, while the precision-machined aluminum construction ensures consistent OEM-spec balancer runout. The inertial mass ring is bonded with high-quality elastomer that maintains vibration isolation under various operating conditions.

This balancer is compatible with stock 5.3L and high-output 6.2L LS engines in Y-body platforms like the Camaro, Firebird, and GTO. It is particularly beneficial for those looking to enhance performance and reliability during high-RPM operation. By absorbing harmful harmonic vibrations, it protects critical engine components and contributes to a longer-lasting drivetrain.