PDI Big Boss™ Cryo‑Treated CAT 3406E/C15/C16 Head Stud Kit

Available for: All CAT 3406E, C15, and C16 Engines

Key Benefits

• Triple Step Cryogenic Cyle
• Parallel-Ground Hardened Washers
  
• Superior fatigue resistance
• Torque Accuracy
• Thermal Stability
• Corrosion Protection
• Ready-to-Install Kit

Warranty: 1 Year Unlimited Mile Warranty

Upgrade cylinder‑head integrity and lock in long‑term performance with PDI’s premium cryogenic‑treated head stud kit. Preload is set on the nut, not twisted through the stud—yielding up to 20 % tighter clamp‑load consistency than bolts. Threads see one installation; no repeated wear in your costly block.

Engineered for heavy‑duty powerhouses that run harder and longer, every bolt is precision‑machined, deep‑frozen to –300 °F, and slowly tempered back to room temperature—relieving internal stresses and creating a denser, more uniform grain structure. The result? Rock‑solid clamp load you can trust, mile after mile.