DFC Diesel TH6707518SOALB Tow/Haul Series Standard/Auto Speed Of Air Long Block | 2007.5-2018 Dodge RAM 6.7L Cummins

Features:

• Handles Up To 600 Horsepower
• Includes O-Ringed Cylinder Head
• Ceramic-Coated Piston Crowns For Heat Resistance
• Skirts Coated With Dry Film For Longevity
• ARP 2000 Or OptiTorque Head Studs Installed
• Equipped With Stage 4 Performance Camshaft
• Manton Heavy-Duty Pushrods For Extra Strength
• 103lb Heavy-Duty Valve Springs Included
• Total Seal Gapless Rings For Maximum Compression
• Backed By 5-Year / 100,000-Mile Warranty
• Precision Machined Using Rottler CNC Equipment
• Perfect For Heavy Towing And Daily Use

This Engine Was Built To Handle The Heavy Stuff

If you're the kind of guy who regularly hauls trailers, loads down the bed, or just demands more from your truck, the DFC Tow/Haul Series Long Block is made with your workload in mind. This isn’t a basic reman, it’s a purpose-built upgrade for 2007.5-2018 6.7L Dodge Cummins owners who want extra pulling power without sacrificing reliability. It’s designed to support up to 600 horsepower, so whether you’re climbing steep grades with a fifth-wheel or cruising cross-country with a heavy load, this engine can handle it. With ceramic-coated pistons and dry film coated skirts, it’s built to take heat and stress in stride. You’ll also get upgraded internals like a Stage 4 camshaft and Manton heavy-duty pushrods, which are perfect for hard-working trucks that never sit still for long. Everything about this long block is engineered to extend the life of your build while giving you the confidence to push it harder. If you depend on your truck every day, this engine is built to keep up.

The Right Internal Upgrades Make All The Difference

The DFC Tow/Haul Series takes everything from the Street Series and pushes it to the next level with performance-ready internals built to handle higher loads. Each engine is precision machined with Rottler CNC equipment and bored to accept the next oversized piston, ensuring proper fit and maximum reliability. It features an O-ringed cylinder head for superior sealing, along with a Cometic MLS gasket set to better hold cylinder pressure under extreme conditions. The Stage 4 camshaft enhances valve timing for increased torque, while 103lb heavy-duty valve springs and Manton pushrods help maintain proper valvetrain control under high stress. Ceramic-coated piston crowns and dry film coated skirts increase durability, especially during extended hauling or towing. The block includes ARP 2000 or OptiTorque head studs, depending on availability, to keep the head secure under boosted conditions. Whether you’re building for performance or peace of mind on the job, this long block provides a solid, ready-to-install foundation.

Fits: 2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Dodge RAM 6.7L Cummins

Notes:

• Designed for 2007.5-2018 6.7L Dodge Cummins trucks
• Rated for up to 600 HP at the flywheel
• Ideal for towing, hauling, and performance use
• Includes all Street Series upgrades plus additional enhancements
• Engine is remanufactured using new OEM or equivalent components
• Long block does not include fuel system, turbo, or electronics
• Includes remanufactured cylinder head with new internals
• Head studs may be ARP 2000 or OptiTorque depending on stock
• Built with ceramic-coated pistons and coated skirts for durability
• Includes heavy-duty valvetrain components for higher stress use
• Comes with a 5 year / 100,000 mile (160,000 km) warranty
• Requires professional installation for best performance and longevity

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.