ARP 230-4301 Head Stud Kit for 2017-2025 GM 6.6 L Duramax L5P

Vehicle Fitment

• 2017-2025 Chevrolet/GMC 6.6 L Duramax L5P V8 (All configurations)

Features

• Constructed from ARP2000® alloy - the top-tier fastener steel
• Heat-treated to 220,000 psi tensile strength for maximum durability
• Centerless-ground for precise concentricity and fit
• Thread-rolled post-heat treatment to enhance fatigue resistance
• Black oxide finish for superior corrosion protection
• Includes chromoly 12-point nuts and hardened parallel-ground washers
• Broached stud ends ease cylinder head removal in tight engine compartments
• Includes ARP Ultra-Torque assembly lubricant for accurate preload

Specifications

• Material: ARP2000® alloy steel
• Tensile Strength: 220,000 psi
• Finish: Black oxide
• Socket Sizes: 5/8" & 10 mm 12-point, Allen as specified by OEM
• Quantities: Complete head stud kit (studs, nuts, washers, lubricant)
• Drivetrain Compatibility: N/A (engine-mounted; vehicle drivetrain independent)

Included Components

• Full set of head studs (engine-specific quantity)
• Chromoly 12-point nuts
• Hardened parallel-ground washers
• 1x Packet of ARP Ultra-Torque assembly lubricant
• Installation instructions

Product Description

The ARP 230-4301 Head Stud Kit is engineered specifically for the GM 6.6 L Duramax L5P V-8 engine found in Chevrolet Silverado, GMC Sierra and other GM trucks from 2017 to 2025. Replacing the factory torque-to-yield head bolts with premium ARP2000® alloy studs provides dramatically improved clamp load and durability - essential for high-boost performance diesel builds or towing applications.

These studs are cold-forged and heat-treated before being centerless ground and thread-rolled to ensure optimal concentricity and fatigue resistance. With broached ends for easier head removal and a black oxide finish for corrosion protection, this kit delivers enhanced longevity and serviceability.

Each kit includes chromoly nuts, parallel-ground washers, and ARP Ultra-Torque lubricant to ensure consistent torque application and proper preload. For enthusiasts and professionals alike looking to strengthen head retention and improve overall engine reliability, the ARP 230-4301 Head Stud Kit is a proven upgrade.