Due to high demand, tuning turnaround is a minimum of 2 weeks. Current lead times on custom built turbos is ~1 month. Please plan accordingly. We thank you for your support of the finest parts available for the 6.5L Turbo diesel platform!

ProMaxx Replacement Cylinder Head


  • $429.99

Complete 6.5L turbo spec replacement aftermarket cylinder heads with diamond pre-cups.  Ready to install with true surface, proper valve depth & no core charge. Generally accepted as being better all-around than original GM castings, these heads are very popular, cost-effective, replacements vs trying to refurbish fault prone GM heads. 

Available for truck or van engine configurations. Please verify your selection when adding to cart and message us with any questions about cross-compatibility for your project. 

Sold Individually, 2 required per engine.

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Truck heads cross reference to GM part #12533543

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