DFC Diesel TH6004STSOALBHD Tow/Haul HD Series Standard Speed Of Air Long Block | 2004 Ford F250/F350 6.0L Powerstroke

Features:

• Built for up to 900 horsepower
• Designed for towing up to 750 HP
• Wagler or Carrillo rods installed
• Balanced rotating assembly for smooth performance
• HD flexplate for improved durability
• New OEM balancer included
• Includes all Street and Tow Series upgrades
• ARP 2000 or OptiTorque head studs
• ARP connecting rod bolts pre-installed
• Remanufactured to meet OEM specifications
• Includes complete gasket kit and cylinder heads
• 5-year or 160,000km limited warranty

When You Need Power That Works As Hard As You Do

If you’re the type who tows heavy, drives hard, and expects more than stock can handle, the DFC Diesel TH6004STSOALBHD Tow/Haul HD Series Long Block is exactly what your truck has been waiting for. Designed to support up to 900 horsepower, this engine brings serious muscle to the table without sacrificing everyday reliability. It’s built for the kind of work that punishes weak components, whether that’s hauling a trailer through the mountains or putting power down on the open highway. With upgrades like a balanced rotating assembly, HD flexplate, and a new OEM balancer, you get the confidence to push your 6.0L Powerstroke further than ever. The forged connecting rods, Wagler or Carrillo depending on availability, give the bottom end the durability needed for high-stress towing or weekend performance. DFC even backs this engine with a 5-year, 160,000km warranty, so you know it’s made to last. If you're running a 2004 F250 or F350 and want a serious upgrade without cutting corners, this long block is built for the job.

Built For High Output With Proven Internal Strength

The Tow/Haul HD Series is DFC Diesel’s most advanced 6.0L Powerstroke long block, engineered to handle higher power levels while retaining long-term drivability. It’s built using a professionally machined and bored block fitted with oversized pistons and remanufactured heads that are magnafluxed, resurfaced, and rebuilt with new guides, valves, seats, and stem seals. All components meet or exceed OEM specs, including the new pistons, rings, and gaskets that ensure consistent compression and durability. Internally, the rotating assembly is balanced and strengthened with forged connecting rods from either Wagler or Carrillo, depending on availability. ARP connecting rod bolts and either ARP 2000 or OptiTorque head studs further reinforce the structure to withstand serious cylinder pressures. You’ll also get a complete short block, top-end gasket kit, and pre-installed rockers and pushrods to streamline the install process. This engine is ideal for 2004 F250 and F350 owners who want a high-performance diesel platform that can keep up with demanding towing and hauling needs.

Fits: 2004 Ford F250/F350 6.0L Powerstroke

Notes:

• Rated for up to 900 HP at the flywheel
• Optimal towing power range is 500 to 750 HP
• Includes all upgrades from Street and Tow/Haul Series
• Forged rods may be Wagler or Carrillo based on availability
• Balanced rotating assembly improves performance and engine life
• Comes with new OEM balancer and HD flexplate
• Built using new OEM or equivalent pistons, rings, and gaskets
• Remanufactured heads are magnafluxed, resurfaced, and rebuilt
• Block is machined and bored for oversized pistons
• Includes complete gasket kit, cylinder heads, and valve components
• Backed by a 5-year, 160,000km manufacturer warranty
• Professional installation is highly recommended
• Designed specifically for 2004 F250 and F350 6.0L Powerstroke models

Street Series vs Tow/Haul vs Tow/Haul HD

• Street Series: Ideal for daily driving, light work, and diesel enthusiasts. Focuses on reliability upgrades over stock, with head stud and sealing improvements.

• Tow/Haul Series: All Street upgrades plus added performance parts for higher load and towing power. Supports builds up to ~700 HP.

• Tow/Haul HD Series: The most robust option. Adds heavy-duty internals like Wagler rods and a balanced rotating assembly for 800+ HP capability.

Standard/Auto vs Standard vs Auto

• Standard/Auto: Compatible with both manual and automatic transmissions. Offers the most flexibility.

• Standard: Built specifically for manual transmission configurations.

• Auto: Built specifically for automatic transmission setups.