Description
2001-2025 Duramax Harmonic Damper Bolt Kit (129-2503)
The ARP 129-2503 Harmonic Balancer Bolt for your GM 6.6L Duramax is optimized for enhanced reliability and increased strength. ARP bolts are cold forged to ensure molecular integrity, heat treated prior to thread rolling and machining and designed to exceed the OEM fasteners in strength and durability. Optimum design, enhanced reliability and increased strength are the main attributes of ARPs Pro Series balancer bolt kits.
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