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The ARP 129-2503 Harmonic Balancer Bolt for your GM 6.6L Duramax is optimized for enhanced reliability and increased strength. Each kit includes a Pro Series balancer bolt that is rated at 200,000 psi tensile strength, and 8740 parallel ground washers. 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. FEATURES: Increased Strength Increased Reliability 200,000 PSI Tensile Strength
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🇺🇸 Ship from USA · On Agora since 2026
$23.92