DFC Diesel TH671719SOALB Tow/Haul Series Speed Of Air Long Block | 2017-2019 Ford F250/F350 6.7L Powerstroke

Features:

• 5-year, 160,000 km limited warranty
• Built to handle up to 550 HP
• Complete long block with cylinder heads
• Includes full top end gasket kit
• All new pistons, rings, and bearings
• Ceramic coated piston crowns for heat resistance
• Dry film coated piston skirts reduce friction
• Manton HD push rods for added strength
• Pinned crankshaft gear prevents gear slippage
• ARP or OptiTorque head studs installed
• Total Seal gapless piston rings standard
• Professionally machined block for oversized pistons

Take On Heavy Loads With Unmatched Confidence

When your 2017-2019 Ford F250 or F350 6.7L Powerstroke needs a replacement engine that can handle serious work, the DFC Diesel TH671719SOALB Tow/Haul Series Speed Of Air Long Block is built to deliver. Designed for trucks that spend their time towing, hauling, and handling demanding jobs, this engine provides the strength and dependability you need every day. Rated for up to 550 HP at the flywheel, it is ready to take on big loads without breaking a sweat. Upgrades like ceramic coated piston crowns and dry film coated skirts help manage heat and friction, keeping the engine running smooth under heavy strain. Manton HD push rods add another layer of durability, making this build a perfect match for trucks that live under a trailer or carry serious weight in the bed. Backed by a 5-year, 160,000 km warranty, you can put your Powerstroke back to work with total peace of mind. Whether it is a jobsite, a long haul, or a heavy weekend project, this engine was made to handle it all with confidence.

Built With Precision For Serious Towing Power

The DFC Diesel TH671719SOALB Tow/Haul Series Speed Of Air Long Block is engineered with precision machining and premium components to meet the demands of heavy-duty use. Each block is professionally machined and bored to accept the next oversized piston, ensuring proper fitment and long-term reliability. All new pistons, rings, bearings, and gaskets are included, with ceramic coated piston crowns for better heat management and dry film coated skirts to reduce friction. Total Seal gapless piston rings come standard, improving compression and helping maintain power under load. The crankshaft gear is pinned to prevent slippage, a key upgrade for engines that see constant torque and stress from towing. Manton HD push rods offer additional reinforcement to handle high cylinder pressures without flexing. With ARP or OptiTorque head studs installed, head sealing strength is significantly increased for demanding towing applications. Designed specifically for the 2017-2019 Ford F250 and F350, this long block combines precision, durability, and performance to keep your Powerstroke ready for the toughest jobs.

Fits: 2017, 2018, 2019 Ford F250/F350 6.7L Powerstroke

Notes: 

• Engine is a long block, not a complete drop-in
• Designed for 2017-2019 Ford F250 and F350 6.7L Powerstroke
• Rated for towing and hauling up to 550 HP
• Includes cylinder heads and complete short block assembly
• Comes with a full top end gasket kit for installation
• External components such as turbo, fuel system, and sensors must be reused or replaced
• Ceramic coated piston crowns and dry film coated skirts included
• Manton HD push rods and pinned crankshaft gear for added durability
• Uses ARP or OptiTorque head studs depending on availability
• Backed by a 5-year, 160,000 km (100,000 mi) limited warranty
• Professional installation is recommended to maintain warranty coverage

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.