Chevrolet Performance Harmonic Balancer Bolts 12557840

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Harmonic Balancer Bolt, Gen. 3 and 4 LS engines only. Steel, Cadmium, Hex Head, Chevy, 4.8, 5.3, 5.7, 6.0, 6.2L Chevrolet Performance harmonic balancer bolts are made of high-quali ty steel and are heat-treated for extra strength. They feature a hex head to prevent socket slippage when loosening or tightening. The bolts are available in a variety of lengths, thread sizes, and finishes. Order the fasteners recommended for your year/make and engine application. Show more