Harmonic Balancer/Crank Pulley, 25 Percent Underdrive, SFI, Internal Balance, Medium Spacing, Chevy, Pontiac, 5.7, 6.0L, Each
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Integral harmonic damper and crank pulley design provides a 25 percent underdrive. Installation of this damper requires new belts and damper bolt, see the "Required Parts" tab. Fits medium spacing pulley kits only.