DFC Diesel SS661116LMLSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2011-2016 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LML/LGH

Features:

• 5-year / 160,000 km warranty
• Premium Callies forged crankshaft included
• Built with all new OEM components
• Includes ARP or OptiTorque head studs
• Total Seal gapless piston rings
• Precision-machined to factory specifications
• Cylinder heads fully rebuilt and resurfaced
• Upgraded gasket sealing in leak-prone areas
• Woodruff keyed camshaft for reliability
• EDM doweled oil pump gear for durability
• Complete top-end gasket kit included
• Pre-set rockers and pushrods to spec

Unlock The True Potential Of Your Duramax

If your 2011-2016 GM or Chevrolet 2500HD or 3500HD is ready for a fresh start, the DFC Diesel Street Series Speed Of Air Long Block with Callies Crankshaft is the upgrade that takes your truck well beyond stock performance. This engine is built for the diesel owner who wants dependable power every time the key turns, whether that means hauling heavy equipment or taking on long highway miles. The addition of the premium Callies forged crankshaft ensures unmatched strength in the bottom end, giving you confidence even under high load and heavy towing. Every unit is packed with quality from top to bottom, including new OEM or equivalent pistons, rings, gaskets, and bearings. The ARP or OptiTorque head studs lock in reliability under boost, while Total Seal gapless piston rings help maintain power over the long haul. From the worksite to the weekend, this engine is designed to keep your truck running strong without compromise. And with a 5-year, 160,000 km warranty, you can put your Duramax to work knowing you are backed by one of the best guarantees in the business.

Built With Premium Components For Lasting Performance

The DFC Diesel SS661116LMLSOALB Street Series Long Block is more than just a remanufactured engine. Every block is precision-machined using advanced Rottler equipment and bored for the next oversized piston to ensure exact tolerances and a perfect fit. The included Callies forged crankshaft delivers exceptional bottom-end strength, making it ideal for demanding applications where reliability is non-negotiable. Cylinder heads are fully rebuilt with new valves, guides, seats, and stem seals, then resurfaced and magnafluxed to ensure a flawless seal. Critical upgrades like the EDM doweled oil pump gear and woodruff keyed camshaft help prevent common failure points seen in stock configurations. Improved gasket sealing methods target known leak-prone areas, giving you confidence in long-term performance. Rockers and pushrods come pre-set to factory specifications for a smoother installation, and the included top-end gasket kit ensures you have everything needed to finish the job right. This is a long block that is engineered to exceed OEM standards and deliver dependable performance mile after mile.

Fits: 2011, 2012, 2013, 2014, 2015, 2016 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LML/LGH

Notes:

• Confirm fitment for 2011-2016 LML/LGH applications.
• Select Standard/Auto variant to match transmission.
• Includes premium Callies forged crankshaft.
• Long block excludes turbo, injectors, and accessories.
• Head studs may be ARP or OptiTorque.
• Complete top-end gasket kit is included.
• Rockers and pushrods arrive preset to spec.
• Block is machined for next-oversize pistons.
• 5-year / 160,000 km warranty; follow break-in.
• Professional diesel installation is recommended.
• Prime oil and fuel systems before first start.
• Freight delivery requires pallet access and inspection.
• Core return may be required using the supplied crate.
• Inspect reused externals for wear before install.

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.