The ARP 130-0201 Rocker Arm Stand Bolt Kit is designed to secure the rocker arm assemblies on 2001–2010 6.6L Duramax engines (LB7, LLY, LBZ, LMM), helping maintain proper valvetrain alignment and stability under load. Featuring a 12-point head design and built from high-strength ARP alloy, these bolts provide consistent clamping and improved durability compared to factory hardware, making them a solid upgrade for engine builds, repairs, and high-load diesel applications.