Order processing time is delayed due to extended tax & stimulus refunds. Please email us ahead of time if you are on a specific timeline. Turbos and plenums are made to order and will have additional lead time. As always, we appreciate your support of our small business and look forward to working with you!

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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