he ARP 150-2504 Harmonic Balancer Bolt Kit is designed to securely retain the balancer on 2011–2023 6.7L Power Stroke engines, ensuring proper alignment and stability of the rotating assembly under load. Featuring a 12-point head design and manufactured from high-strength ARP 8740 material, these bolts provide increased clamping force, improved durability, and consistent torque retention compared to factory hardware. Ideal for engine service, rebuilds, and high-load applications, this kit helps maintain crankshaft stability and long-term reliability.