TH60050618AUSOALBHD Tow/Haul HD Series Auto Speed Of Air Long Block

Features:

• 18MM Head Dowell
• Built for up to 900 horsepower
• Designed for towing between 500-750 HP
• Includes Wagler or Carrillo connecting rods
• Balanced rotating assembly for smoother operation
• New OEM balancer improves engine stability
• HD flexplate included for added strength
• O-ringed heads improve combustion sealing
• Stage 2 billet camshaft enhances power delivery
• Total Seal gapless piston rings reduce blow-by
• ARP or OptiTorque head studs included
• Manton HD pushrods installed for durability
• Backed by 5-year, 160,000 km warranty

Push Your Powerstroke Farther Than Ever Before

If you're looking to squeeze every bit of performance from your 2005-2006 F-250 or F-350 without giving up reliability, the DFC Tow/Haul HD Series Long Block is the one to beat. This engine isn't just rebuilt, it’s upgraded from the inside out to handle serious horsepower while keeping daily drivability intact. Rated for up to 900 HP at the flywheel, it’s built for truck owners who tow heavy, drive hard, and demand more than just stock-level strength. With premium internals like Wagler or Carrillo rods, a new OEM balancer, and a heavy-duty flexplate, it delivers the extra confidence you want when pushing limits. Whether you're pulling a trailer across long hauls or running upgraded tunes and bigger injectors, this long block is ready to take the abuse and keep performing. It also includes all the performance gains from the Street and Tow/Haul Series engines, so nothing gets left out. Backed by a 5-year, 160,000 km warranty, this build gives you the power to go big without the worry of cutting corners.

Engineered With Premium Parts For Extreme Output

The Tow/Haul HD Series Long Block from DFC Diesel is purpose-built for extreme applications where added power and durability are essential. Starting with a fully remanufactured 6.0L Powerstroke block, this engine is bored for oversized pistons and fitted with all new OEM or equivalent internals. The rotating assembly is fully balanced to handle high horsepower levels without sacrificing smooth operation. Inside the build, you'll find Wagler or Carrillo connecting rods depending on availability, ARP or OptiTorque head studs, and Total Seal gapless piston rings for optimal cylinder pressure and reduced blow-by. A stage 2 billet camshaft, ceramic-coated piston crowns, and dry film-coated skirts are also included to enhance heat resistance and reduce internal wear. Every cylinder head is resurfaced, magnafluxed, and rebuilt with new valves, seats, guides, and seals for consistent performance. A new OEM balancer and HD flexplate round out the build, supporting both street use and serious towing demands. This long block is a comprehensive solution for drivers who want to run hard and stay reliable, no matter the load.

Fits: 2005, 2006 Ford F250/F350 6.0L Powerstroke

Notes:

• Fits 2005-2006 Ford F-250 and F-350 with 6.0L Powerstroke
• Rated for up to 900 horsepower at the flywheel
• Recommended for towing applications between 500-750 HP
• Includes all upgrades from both Street and Tow/Haul Series engines
• Wagler or Carrillo connecting rods included based on availability
• New OEM balancer and HD flexplate included in build
• Balanced rotating assembly improves high-power performance
• Engine block is professionally machined and bored for oversized pistons
• Built using all new OEM or equivalent name-brand internal parts
• Cylinder heads are resurfaced, magnafluxed, and completely rebuilt
• Backed by a 5-year, 160,000 km manufacturer warranty
• Additional components may be required for full installation

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.