TH6004STSOALB Tow/Haul Series Standard Speed Of Air Long Block

Features:

• Built for up to 600 horsepower
• Perfect for towing and hauling power
• Includes O-ringed cylinder heads
• Stage 2 billet camshaft installed
• Total Seal gapless piston rings
• Ceramic-coated piston crowns
• Dry film-coated piston skirts
• ARP 2000 or OptiTorque head studs
• Heavy-duty Manton pushrods included
• ARP connecting rod bolts pre-installed
• Complete top-end gasket kit included
• Compatible with 2004 F250/F350 6.0L

Power You Can Trust When The Load Gets Heavy

If you rely on your truck to move serious weight, the DFC Diesel TH6004STSOALB Tow/Haul Series Long Block is the kind of upgrade that won’t let you down. Built for drivers who demand consistent performance under pressure, this engine is rated up to 600 horsepower at the flywheel, giving you the confidence to tow, haul, or climb without second-guessing what’s under the hood. It comes equipped with critical enhancements like a Stage 2 billet camshaft and Total Seal gapless piston rings, both designed to deliver power with reliability in mind. This long block is built to handle the real-world abuse that comes with loaded trailers, steep inclines, and long miles on the highway. You’ll also get ceramic-coated piston crowns and dry film-coated skirts for added heat resistance and durability under load. DFC doesn't just assemble engines, they engineer them to handle everything from jobsite demands to weekend trailering. Whether you’re running a 2004 F250 or F350 with a 6.0L Powerstroke, this long block delivers the kind of strength that makes hard work feel a lot easier.

Every Piece Designed With Serious Work In Mind

Under the hood, this Tow/Haul Series long block packs the kind of components serious builders look for. Starting with the DFC long block assembly, it’s built from the ground up with ARP connecting rod bolts and either ARP 2000 or OptiTorque head studs, depending on availability. These fasteners help maintain head and rod integrity under extreme cylinder pressure, which is essential when pushing the upper limits of power and load. The engine also features O-ringed cylinder heads to improve sealing under boost, a key feature when towing or running upgraded turbos. Internally, the pistons have chamfered bowls and are treated with ceramic coating on the crowns, along with dry film coating on the skirts to reduce friction and improve heat dissipation. Heavy-duty Manton pushrods and a Stage 2 billet camshaft round out the valvetrain, boosting reliability and top-end stability. You’ll also receive a full top-end gasket kit, rockers, and pushrods pre-installed, making the install process smoother and faster. Built for 2004 model year Ford F250 and F350 trucks with the 6.0L Powerstroke, this engine delivers the performance and toughness that heavy-duty work demands.

Fits: 2004 Ford F250/F350 6.0L Powerstroke

Notes:

• Rated for up to 600 HP at the flywheel
• Designed specifically for towing and hauling use
• Includes all Street Series upgrades plus added enhancements
• Built to support performance applications up to 550 HP
• Compatible with 2004 Ford F250 and F350 6.0L Powerstroke
• Long block includes short block, cylinder heads, and gasket kit
• Head studs may be ARP 2000 or OptiTorque based on availability
• Engine includes pre-installed rockers and pushrods
• Ideal for customers upgrading from stock or replacing worn engines
• Professional installation recommended due to complexity
• Dyno tuning may be required to reach full performance potential

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.