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25% Underdrive Balancer Kit

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$500.00$570.00

A 25% undriven harmonic balancer, also known as a "crank pulley," is intended to reduce harmonic vibrations in an LS engine's crankshaft. The percentage denotes the pulley's size in relation to the factory pulley. As a result, a 25% undriven harmonic balancer has a 25% smaller diameter than a factory pulley. The primary benefit of using a smaller harmonic balancer is that it reduces the rotating mass of the crankshaft, which can improve engine performance. Reducing the rotating mass of the crankshaft allows the engine to rev faster and respond to throttle inputs more quickly, which can lead to improved acceleration and overall performance.

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