ARP 238-4201 Caterpillar C15 12-Point Head Stud Kit

The ARP 238-4201 head stud kit is engineered specifically for Caterpillar C15 diesel engines, providing superior clamping force and reliability for high-performance and heavy-duty applications. This complete kit features 12-point nuts for easier installation and more secure torqueing compared to standard hex nuts.

Key Features:

• Manufactured from premium 8740 chromoly steel with 190,000 psi tensile strength
• Precision centerless-ground and thread-rolled to Mil-S-8879 specifications
• Cold-forged to ensure molecular integrity throughout the fastener
• Heat-treated prior to thread rolling for superior fatigue resistance
• Black oxide finish provides corrosion protection and wear resistance
• 12-point nut design for improved torque accuracy and easier installation
• Includes hardened parallel washers for uniform load distribution

ARP Pro Series head studs are the professional choice for engine builders working on heavy-duty diesel applications. Each stud is manufactured to aerospace-quality standards, ensuring consistent clamping loads and reliable performance under extreme cylinder pressures. Whether you're rebuilding a Caterpillar C15 for increased boost levels, higher horsepower output, or simply restoring reliability, these head studs provide the foundation for a durable, long-lasting engine build.