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USD 789
Part #:

ProMaxx FOR85XNB Bare Replacement Cylinder Head

2003-2007 Ford 6.0L Powerstroke
Part #:
FROM 789
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The ProMaxx FOR85XNB Bare Replacement Cylinder Head is a high quality replacement for your 2003-2007 Ford 6.0L Powerstroke. Built with thicker castings in crack prone areas, these heads undergo extensive testing and quality control to ensure that you receive the best product possible.

ProMaxx performs the following tests and procedures: All fuel rails are drilled and checked, all heads are push rod clearanced, glow plugs and injectors are test fit, all recession depths are checked, all heads are pressure tested, and all holes are tapped including glow plug threads.

Sold as a "bare" casting without any valves, seals or springs this head is a perfect start for those that want to upgrade their valvetrain. These brand new castings are sold without a core charge.

  • New Casting
  • Sold Individually
  • No Core Charge!
  • Improved Casting In "Problem Areas"
  • Available For 18MM & 20MM Dowels

Note: Model year ranges are suggested applications. Please confirm dowel size on your truck before ordering. 
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Vehicle Applications

2003 Ford 6.0L Powerstroke
2004 Ford 6.0L Powerstroke
2005 Ford 6.0L Powerstroke
2006 Ford 6.0L Powerstroke
2007 Ford 6.0L Powerstroke

Product Options

FOR851NB 06-07 (20MM) (10mm Rocker Carrier Bolts)
FOR850NB 03-05 (18MM) (8MM Rocker Carrier Bolts)


  • Manufacturer Name ProMaxx Performance
  • Shipping Weight 30.00 lb.
  • Shipping Length 12 in.
  • Shipping Width 30 in.
  • Shipping Height 10 in.
  • Fuel Type Diesel
  • Warranty Yes
  • Warranty Info 1 Year Limited
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Internal LR


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Questions and Answers

Do these heads have hardend valve seats?
View Staff Answer 

The ProMaxx Replacement Cylinder Heads have hardened valve seats.

What is the warranty on these heads? Warranty
View Staff Answer 

There is a 1 year warranty on the PROMAXX FOR85XNB BARE REPLACEMENT CYLINDER HEAD.

This is a single head right, so I’d have to order two?
View Staff Answer 
Correct, the ProMaxx FOR85XNB Bare Replacement Cylinder Head is sold individually, so you'll need to purchase 2 to do both cylinder banks.

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