ProMaxx FOR85XN Replacement 6.0L Cylinder Head

★★★★★ ★★★★★ 4.4 (7 Reviews)

Vehicle Fitment For:
2003-2007 Ford 6.0L Powerstroke

See full application list below
FROM 1261.11

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Description

The ProMaxx Performance Cylinder Heads are high quality replacements 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, all holes are tapped including glow plug threads and each head gets an in-house valve job. 

Sold individually as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install. Sold individually. 

Features: 
  • 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. 
Manufacturer Warranty*:
1 Year Limited
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Instructions & Tech Info

Product Options

PART NUMBER MODEL YEAR
FOR850N 03-05 (18mm) (8mm Rocker Carrier Bolts)
FOR851N 06-07 (20mm) (10mm Rocker Carrier Bolts)

Reviews

Overall Rating
4.4/5
7 Reviews
Rating Snapshot
Verified Buyer
★★★★★ ★★★★★
Head
Tim (LA) | May 7th, 2023
Awesome service!
 
★★★★★ ★★★★★
Just Installed, and no issues.
William (Alturas) | September 11th, 2021
I've given them a four star rating only because I don't have an extended number of miles on them yet. However, I was able to order these in a time crunch and have them delivered in two days. That allowed me to stay on schedule. That was actually pretty amazing. Next, they were packaged well, and they installed perfectly with the new ARP studs. I had not one glitch with anything. Nothing I saw indicated anything less than a perfect replacement for a time sensitive engine repair where I could not afford to wait n having my originals checked out and remanufactured. Fast forward, two days after I buttoned the engine back up, I hooked up to a 10,000 lb trailer and towed 2500 miles. As of now, I'm probably 3500 miles past the installation and initial fire up on these heads, and they are performing exactly like the originals did. What more could I expect? I'll let you know in another 200,000 miles if they hold up as well as the originals did.
 
★★★★★ ★★★★★
Great product
Christian (Rhode Island) | July 13th, 2021
about 15k on them. No issues
 
★★★★★ ★★★★★
Typical China product
carbon (california) | February 26th, 2020
Pro Max needs a guy in china over seeing production! My heads arrived and had all the valves at differant depths fron003 to 015 they spec @ .013 - .025 .020 IS PREFERED! not all over the place. these motors use valve depth to determine compression. So I spent 800 bucks on a vavle job and blue printed them myself. Not to mention they didn't have square dimensions but wedge instead of rectangle 1 of my exhaust manifold bolt holes needed to be tapped the correctly. They do have good valve seats though and are square where they need to be but having the whole job done in good old red china is what it is. They say 3-5 days but they have to order them from china so it will take 3 weeks. Thats what it takes for me to get my products made there if I wantedthem done there. XDPwas great in getting me the product but Pro Max has a quality issue I'd buy from another using the same supplier. If you meet the min you can have your name on them also from the same guy in china. And have them blueprinted.
 
★★★★★ ★★★★★
Perfect replacement
Brad from BDR (IL) | October 17th, 2018
Don't let old reviews fool you. Quality has been achieved and I've been using these heads for over 2 years now with zero issues. Love them. And they are about $200 more expensive than getting an old set of heads done(Not to mention if the old ones aren't cracked)
 
★★★★★ ★★★★★
So far so good!
Chad (Tucson AZ) | May 7th, 2018
I bought these heads over a year ago. I got 32,000 miles on them with 3 trips pulling my 14k toyhauler through the Arizona mountains in the dead of summer. I also pulled 25k through town with a small hill climb.
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Frequently Asked Questions

Are these sold as a pair or is this per head?
Sold Individually
Who is the manufacturer of the head?

ProMaxx Performance out of Rainbow City AL.

Does the new cylinder head come with gaskets?
Gaskets are not included.
Do they come fire ringed?

The ProMaxx FOR85XN Replacement Cylinder Head are a direct replacement of your factory heads and do not offer any performance upgrade options.

Do the studs come installed?

The ProMaxx FOR85XN is a replacement cylinder head and does not include bolts nor studs.

stock valve springs? are the valve springs stock or heavy duty for more power

The PROMAXX FOR85XN REPLACEMENT CYLINDER HEAD will include stock valve springs.

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Specifications

ID 17894
Manufacturer Name ProMaxx Performance
Shipping Weight 75.00 lb.
Fuel Type Diesel
Manufacturer Warranty* 1 Year Limited
Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
Internal LR

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