129-2503 | ARP GM Duramax 6.6L Harmonic Balancer Bolt Kit
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Harmonic Damper Bolt Kit
GM Duramax 6.6L
Socket Size(s) : 1-1/16 12pt
When you upgrade the performance of your Duramax engine, many times you will exceed the capabilities of the factory hardware. ARP has the solution for you. Made out of premium grade 8740 alloy, this balancer bolt has a strength rated far superior to OE and "aircraft" quality. This ARP bolt is an excellent choice for your engine.