The ProMaxx CHR418N Replacement Cylinder Head is a direct-fit replacement for the damaged or cracked cylinder head in your 3.9L Cummins 4BT powered vehicle. This cylinder head is a new casting and comes ready to install with all new valves, valve seals, springs, retainers and locks. There is core no charge on this head and it includes a 1 year limited warranty for peace of mind.  



  • New Casting 
  • No Core Charge!
  • Complete Cylinder Head
  • Improved Casting In "Problem Areas"

ProMaxx Replacement Cylinder Head (3.9L 4BT Cummins)


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