Freedom Series HD Cylinder Head - 18mm Dowel

Features:

• Fits 2003–2007 6.0L Power Stroke with 18mm dowels
• Brand-new high strength casting, not remanufactured
• Fully assembled and ready to install
• Single-piece O-ring for improved combustion sealing
• Oversized hardened press-in valve seats included
• Upgraded stainless and Inconel alloy valvetrain
• No core charge or core return required
• Engineered for increased durability and longevity
• Ideal for daily driving or towing applications
• Designed and machined in the USA

The Right Upgrade When You Want Your 6.0L To Last

If you own a 2003-2007 Super Duty with a 6.0L Power Stroke, you already know the cylinder heads can make or break the truck. The Fleece Freedom Series HD Cylinder Head with 18mm dowels is built to eliminate the weak points that cause repeated failures and downtime. This is a brand-new casting designed from the ground up, not a reworked factory core, so you are starting with a clean slate. It comes fully assembled and ready to install, which saves time and removes guesswork during the rebuild process. With upgraded valve seats, a strengthened valvetrain, and improved combustion sealing, it is ideal for daily driving and heavy towing alike. There is also no core charge to worry about, which keeps the process simple from start to finish. If reliability and long-term peace of mind matter to you, this head delivers exactly that.

Purpose Built Engineering For Demanding Power Stroke Applications

The Fleece FPE-61-10011-HD Cylinder Head is engineered to meet or exceed factory specifications while offering meaningful durability upgrades. It starts with a higher tensile strength alloy casting that incorporates increased wall thickness in high stress areas for improved longevity. Each head features hardened, oversized press-in valve seats manufactured from a tungsten alloy, delivering greater wear resistance than OEM designs. A complete valvetrain is included, featuring stainless steel and Inconel valves, along with new springs, retainers, keepers, and seals. Fleece’s exclusive single-piece O-ring design provides superior combustion sealing compared to traditional seamed wire O-rings. This version is designed specifically for engines using 18mm dowels, making proper application selection critical. Built in Fleece’s Freedom Racing Engine facility, this cylinder head is a precision solution for Power Stroke owners who demand strength, consistency, and dependable performance.

Fitment: 2003, 2004, 2005, 2006, 2007 Ford Super Duty 6.0L Powerstroke

Notes:

• Designed for 2003–2007 Ford Super Duty 6.0L Power Stroke
• For use with engines equipped with 18mm dowels
• Fully assembled and ready to install out of the box
• Built from a brand-new casting, not a reman core
• No core charge or core return required
• Ideal for daily driving and heavy-duty towing use
• Head gasket not included; Ford part number KZ3Z-6051-B recommended
• Single-piece O-ring provides better sealing than traditional wire rings
• Fleece recommends using 6.4L pushrods for proper fitment
• Manufactured in the USA at Fleece’s Freedom Racing Engine shop