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ARP Harmonic Balancer Bolt Kit for GM Duramax (6.6L) 129-2503

$30.42

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ARP Harmonic Balancer Bolt Kit for GM Duramax (6.6L) 129-2503

$30.42

$30.42

Specifically engineered for the GM 6.6L Duramax diesel engine, the ARP Harmonic Balancer Bolt Kit (129-2503) provides the essential clamping force required to keep your harmonic damper securely seated on the crankshaft snout. High-torque diesel applications place significant stress on factory hardware; this kit replaces the OEM bolt with a high-strength fastener designed to resist stretching and loosening under extreme operating conditions.

  • Fits GM Duramax (6.6L) engines
  • Replaces factory harmonic balancer mounting hardware
  • Designed for superior clamping force and reliability
  • Essential for high-performance or high-mileage diesel builds
  • Manufacturer Part Number: 129-2503

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