PDI Big Boss™ Cryo‑Treated Cummins ISX/X15 Head Bolt Kit

The PDI Big Boss™ Cryo-Treated CAT C13 Head Bolt Kit is engineered for maximum strength, precision, and durability in Caterpillar C13 diesel engines. Designed to handle the high combustion pressures of performance and heavy-duty applications, this premium kit provides a secure and consistent cylinder-head seal—ensuring reliability and long-term engine integrity under extreme conditions.

Each Big Boss™ Head Bolt undergoes an advanced cryogenic treatment process that realigns the molecular structure of the metal, greatly increasing tensile strength, fatigue resistance, and dimensional stability. This treatment allows the bolts to maintain clamping force and resist stretching, preventing gasket failure and improving overall engine performance.

Perfect for engine rebuilds, high-horsepower upgrades, and preventative maintenance, the PDI Big Boss™ Cryo-Treated CAT C13 Head Bolt Kit delivers unmatched reliability, superior sealing performance, and the proven durability expected from the Big Boss™ line of professional-grade engine components.