Genuine GM LS Engine Harmonic Balancer Bolt – 12557840 (LS1, LS2, LS3, LS6, LQ4, LQ9)

If you're building or repairing an LS series engine, don't trust your harmonic balancer to just any bolt.

This is a brand-new, genuine GM balancer bolt, part number 12557840.

It's the exact OEM part used for engines like the LS1, LS2, LS3, LS6, LQ4, and LQ9.

It's manufactured right here in the United States, ensuring the correct fit and strength needed for this critical engine component.

It comes in its original packaging, ready for installation.

When it comes to something as important as your crankshaft balancer, using the proper GM bolt is essential for safety and reliability.

Pick up this genuine bolt for your LS swap or rebuild project.

It's a small part, but it plays a huge role.