TH640810AUSOALBHD Tow/Haul HD Series Auto Speed Of Air Long Block

Features:

• Built for up to 900 horsepower
• Designed for heavy towing and hauling
• Wagler or Carrillo connecting rods included
• Balanced rotating assembly for smooth performance
• New OEM balancer for improved durability
• HD flexplate handles extreme torque loads
• O-ringed cylinder heads prevent head gasket failure
• Factory-spec rockers and pushrods pre-set
• Complete top-end gasket kit included
• 5-year 160,000 km warranty coverage
• All new OEM pistons, rings, and gaskets
• Professionally machined and bored block

Bring Out The True Strength Of Your Powerstroke

When it comes to pulling heavy loads and pushing your Ford Super Duty to its limits, the DFC Diesel Tow/Haul HD Series 6.4 Powerstroke long block delivers the muscle you need. Built for truck owners who demand serious power, this engine is capable of supporting up to 900 horsepower while still being reliable enough for everyday driving. It comes equipped with premium components like Wagler or Carrillo connecting rods, a balanced rotating assembly, and a heavy-duty flexplate to handle intense torque. Whether you're hauling a fully loaded trailer up a steep grade or taking on demanding job sites, this engine is designed to keep your truck performing under pressure. Every unit is backed by a 5-year 160,000 km warranty, giving you confidence that your investment is protected. Additionally, the professionally machined block and brand-new OEM pistons, rings, and gaskets ensure a precise fit and long-lasting performance. With this engine under the hood, your truck gains the power, durability, and confidence to tackle the toughest tasks without hesitation.

Engineered For Maximum Performance And Lasting Reliability

The DFC Diesel Tow/Haul HD Series 6.4 Powerstroke long block is carefully remanufactured to meet and exceed OEM standards for strength and efficiency. Each block is professionally machined and bored for oversized pistons without the use of sleeves, ensuring a perfect fit and smooth operation. The inclusion of O-ringed cylinder heads helps prevent head gasket issues under high boost conditions, making it a smart choice for both towing and performance applications. Rockers and pushrods are preset to factory specifications, eliminating guesswork during installation and helping you get back on the road faster. With a balanced rotating assembly and a new OEM balancer, this engine is designed to run smoothly even under heavy load. The use of all new name-brand components, including OEM equivalent pistons and gaskets, provides consistent quality and dependable performance. Combined with the complete top-end gasket kit included in every build, this long block offers a straightforward installation and the durability needed for long-term use.

Fits: 2008, 2009, 2010 Ford F250/F350 6.4L Powerstroke

Notes:

• Engine is a remanufactured 6.4L Powerstroke long block
• Built specifically for 2008-2010 Ford F250 and F350 trucks
• Tow/Haul HD Series designed for heavy towing applications
• Capable of supporting up to 900 horsepower at the flywheel
• Recommended for trucks regularly towing between 500-750 HP
• Includes Wagler or Carrillo connecting rods based on availability
• Professionally machined block bored for oversized pistons
• No sleeves used during the remanufacturing process
• Comes with a 5-year 160,000 km warranty
• Includes a complete top-end gasket kit for installation
• O-ringed cylinder heads to reduce head gasket failure
• Factory-spec rockers and pushrods pre-set for easy setup

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.