Genuine GM Harmonic Balancer Bolt Crank Bolt for LS Engines 12557840

• Genuine OEM GM General Motors
• Harmonic balancer fastening bolt
• Crankshaft pulley / vibration damper bolt
• Flanged hex head steel construction
• Direct replacement
• Maintains crankshaft balance and accessory drive alignment
• M16 x 2.0 thread size

Suits:

All LS Engines