For engine builders who demand the highest level of strength and precision in their fasteners, the PPE Head Stud Kit is the ultimate solution for high-performance diesel engines. With a focus on accuracy and strength, each stud is center-less ground with precision and is thread rolled to meet Mil-S-8879 specifications, resulting in increased durability and reduced stress at the threads. With an independently tested and verified tensile strength of over 231,900 psi, these studs outperform even the most venerable manufacturer. Whether you're pushing your engine to its limits on the track or seeking increased longevity, the PPE Stud Kit delivers durability and confidence that surpasses your expectations. Each kit comes complete with everything you need for installation, including hardened parallel washers, nuts, and specially formulated assembly grease for uniform load distribution and accurate torque readings.