Protect your L5P Duramax investment and eliminate one of the most common failure points on modified or heavily worked trucks. The Xotic Performance CP881 Head Stud Kit replaces the factory head bolts with high-strength studs engineered for superior clamp load and long-term reliability.

Factory head bolts on the 6.6L L5P can stretch under elevated cylinder pressures from tuning, towing, or performance modifications, leading to head gasket failure. The CP881 kit solves this with premium XOTIC 7200 alloy steel studs that deliver significantly higher tensile strength (rated at 220,000 psi) and resist stretching far better than stock bolts or standard 8740 chromoly studs.

Key Benefits

• Superior Clamping Force — Maintains consistent head-to-block seal even under high boost and load
• Better Torque Retention — Stud design with top-threaded nuts allows for more precise and repeatable torque than bolts
• Reduced Risk of Head Gasket Failure — Ideal upgrade for daily drivers, tow rigs, and moderately modified L5P trucks
• Easier Serviceability — Broached stud ends simplify cylinder head installation and removal
• Corrosion Protection — Black oxide finish on studs and hardware
• Complete Kit — Includes everything needed for a professional installation

Technical Highlights

• Material: Proprietary XOTIC 7200 high-strength alloy steel
• Studs: 36x M12 x 157 mm (centerless ground for perfect concentricity)
• Threads rolled after heat treatment for maximum fatigue strength
• Hardened parallel washers for uniform load distribution and accurate torque readings
• 12-point nuts for secure, high-torque application

Kit Contents

• 36x Head Studs (M12 x 157 mm)
• 36x M12 12-Point Nuts (N0701 / N0702)
• 36x Hardened Parallel Washers (W0301)
• 12x Rocker Arm Bolts (M8 x 122.5 mm)
• 1x 10 mm Socket
• 1x 16 mm Socket
• 1x 5 mm Allen Wrench
• 1x Fastener Assembly Lubricant
• Full Instruction Manual with torque specifications

Fitment

2017–Present GM 6.6L L5P Duramax Chevrolet Silverado 2500/3500 HD & GMC Sierra 2500/3500 HD

Recommended Use

Perfect for stock to moderately modified L5P builds. Excellent choice for trucks that tow, haul, or run mild tuning/exhaust/intake upgrades. For extreme high-horsepower race applications, consider stepping up to ARP or other competition-grade options.

Note: Cylinder head work is involved. Professional installation is strongly recommended. Always follow the included torque sequence and specifications (multi-stage torque on outer studs to 125 ft-lbs final; specific lower torque on inner row).

Warranty: Lifetime warranty on all fasteners from Xotic Performance.

This is a popular, cost-effective upgrade that gives L5P owners the peace of mind and reliability they need without breaking the bank. Add it to your cart today and keep your Duramax sealed and strong for the long haul.