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Ships within 48 hours · Estimated delivery Sep 28 - Oct 3
deep‑frozen to –300 °F
Big Boss Dual Oil Cooler
The gradual angles of the manifold have been built to reduce swirl rate resulting in cooler exhaust temperatures by 75-100 degrees
3687062 Install Video:
Constructed of quality aluminum cores no corrosion and efficient cooling
PDI Big Boss™ Cryo‑Treated Detroit 60 Series Head Bolt Kit 4298629 deep‑frozen to –300 °FAvailable for: Detroit 60 Series 12. 7L and 14L Engines Key Benefits Maximum clamping force Superior fatigue resistance Thermal Stability Corrosion Protection Ready to Install Kit Warranty: 1 Year Unlimited Mile Warranty Upgrade cylinderhead integrity and lock in longterm performance with PDIs premium cryogenictreated head bolt kit. Engineered for heavyduty powerhouses that run harder and longer, every bolt is precisionmachined, deepfrozen to 300 F,