GM Duramax 6.6L L5P ARP2000 Head Stud Kit

ARP Pro Series ARP2000 Head Stud Kit

For Chevy/GMC 6.6L Duramax L5P (2017–Present)

The L5P Duramax is a powerhouse, but like its predecessors, it is built from the factory with "torque-to-yield" head bolts. These bolts are designed to stretch once and stay that way—making them a major liability when you add a tuner, a larger turbo, or heavy towing demands.

The ARP2000 Head Stud Kit is the essential upgrade for the 2017+ L5P platform. By replacing the factory bolts with ARP2000® studs, you provide the massive clamping force required to keep the cylinder heads from "lifting" under high boost and combustion pressures.

 

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Key Features & Benefits

• ARP2000® Material: This proprietary super-alloy is rated at a massive 220,000 psi tensile strength, providing significantly more clamping force than standard 8740 chrome moly or factory hardware.

• Engineered for the L5P: Specifically designed to accommodate the unique geometry and requirements of the 2017 and newer 6.6L Duramax engines.
• Cold-Forged & Heat-Treated: Each stud is heat-treated before thread rolling and machining, which results in a fastener with 10x better fatigue strength than cheaper alternatives.
• Broached Stud Ends: The tip of each stud is broached to allow for a simple Allen wrench installation, making it easier to seat the studs in the block even when the engine is still in the truck.
• Black Oxide Protection: Finished in a durable black oxide to resist corrosion and ensure long-term reliability under the hood.

 

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Why L5P Owners Need This Kit

The L5P comes from the factory with impressive torque, but it also operates at higher cylinder pressures than earlier generations. If you plan on running "aggressive" tunes or upgrading the fuel system, the factory bolts can fail to maintain a seal.

The ARP 230-4301 kit ensures that the cylinder head and gasket remain a single, immovable unit. This is the "peace of mind" mod that prevents the dreaded "bubbling in the coolant overflow" and the massive repair bills that follow a blown head gasket.

Kit Includes: Complete set of ARP2000 studs, parallel-ground washers, 12-point chrome moly nuts, and a packet of ARP Ultra-Torque assembly lubricant for precise torque loading.