Chevrolet Performance Harmonic Balancer Bolts 12557840

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-quality 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.