DFC Diesel TH6004AUSOALB Tow/Haul Series Auto Speed Of Air Long Block | 2004 Ford F250/F350 6.0L Powerstroke

Features:

• Built to handle up to 600 horsepower
• Ideal for towing and heavy hauling use
• Includes Stage 2 billet camshaft
• O-ringed heads for improved sealing
• ARP or OptiTorque head studs installed
• ARP connecting rod bolts for added strength
• Total Seal gapless piston rings included
• Ceramic coated piston crowns for heat control
• Dry film coated skirts for reduced friction
• Manton HD pushrods pre-installed
• All new OEM or equivalent internals
• Backed by 5-year, 160,000km warranty

Get The Power You Need Without Pushing Too Hard

If your 2004 F250 or F350 needs a serious boost in towing confidence without stepping into race-ready territory, the DFC Tow/Haul Series Long Block is the perfect middle ground. It’s built for truck owners who work hard, haul big, and still want reliable power every day of the week. Rated for up to 600 horsepower at the flywheel, this long block is engineered to hold its own under heavy loads while staying street-friendly. With upgrades like ceramic-coated pistons, a billet Stage 2 camshaft, and reinforced internals, you get an engine that doesn't just survive tough conditions, it thrives in them. Whether you're pulling a loaded trailer, running construction gear, or just want a dependable diesel setup with muscle behind it, this build gives you what you need. It also includes Manton HD pushrods and O-ringed heads for added durability under high combustion pressures. If you're looking for an engine that works just as hard as you do, this one checks all the right boxes.

Built For Load Carrying Durability From The Inside Out

The DFC Diesel TH6004AUSOALB Tow/Haul Series Long Block is a fully remanufactured 6.0L Powerstroke built with a serious focus on towing performance and engine longevity. At the core is a professionally machined and bored engine block, ready to accept oversized pistons for better ring sealing and efficiency. Internally, the engine features all-new components including OEM or equivalent pistons, rings, bearings, and gaskets. The piston crowns are ceramic coated to manage heat more effectively, while the skirts are dry film coated to reduce friction and extend wear life. It also includes a Stage 2 billet camshaft for enhanced torque and performance, especially under heavy load. O-ringed heads improve head gasket sealing, which is critical in high-compression, high-heat diesel applications. Manton HD pushrods and ARP connecting rod bolts come pre-installed, and either ARP 2000 or OptiTorque head studs are used depending on availability. This long block is purpose-built for hard use and comes ready for final assembly with a complete top-end gasket kit included.

Fits: 2004 Ford F250/F350 6.0L Powerstroke

Notes:

• Designed for 2004 Ford F250 and F350 6.0L Powerstroke
• Built for towing, hauling, and performance up to 600 HP
• Includes all upgrades found in the Street Series engine
• Comes with a Stage 2 billet camshaft for added torque
• O-ringed cylinder heads improve gasket sealing under load
• Piston crowns are ceramic coated for better heat resistance
• Piston skirts feature dry film coating to reduce friction
• Equipped with Manton HD pushrods for durability
• Comes with ARP 2000 or OptiTorque head studs depending on availability
• ARP connecting rod bolts pre-installed for added strength
• Includes Total Seal gapless piston rings as standard
• Backed by a 5-year or 160,000 kilometer manufacturer warranty

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.