DFC Diesel SS6607510LMMTKSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2007.5-2010 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LMM TOPKICK

Features:

• Includes forged Callies crankshaft upgrade
• Fits 2007.5–2010 Duramax LMM applications
• Compatible with 2500HD, 3500HD, and TopKick
• Complete long block with top-end gaskets
• All-new pistons, rings, and bearings installed
• Rebuilt heads with new valves and seals
• Gapless Total Seal piston rings included
• ARP or OptiTorque head studs included
• Woodruff keyed camshaft for secure timing
• Machined using advanced Rottler equipment
• Upgraded sealing in high-failure areas
• Backed by 5-year, 160,000 km warranty

Put Real Strength Back Into Your Duramax Build

If your 2007.5 to 2010 Duramax-powered 2500HD, 3500HD, or TopKick is down on power or reliability, this Street Series Long Block from DFC Diesel is the kind of upgrade that takes your build from worn out to worry-free. It’s more than just a replacement, it’s a smarter, stronger foundation built with durability in mind. One of the key highlights is the forged Callies crankshaft, a high-strength component trusted in serious performance applications. This crank holds up under heavy torque and abuse, making it a perfect match for trucks that see real work or long-distance hauling. DFC didn’t stop there though. You’re also getting ARP or OptiTorque head studs, Total Seal gapless piston rings, and a fully remanufactured top end to handle the daily grind. It’s built for guys who depend on their truck every day and need it to start strong, run clean, and last. And with a 5-year, 160,000-kilometer warranty behind it, this long block gives you confidence from the first turn of the key.

Remanufactured With Premium Components And Proven Precision

The DFC Diesel SS6607510LMMSOALB Street Series Long Block is carefully engineered for trucks running the 6.6L Duramax LMM engine from 2007.5 to 2010, including GM 2500HD, 3500HD, and TopKick models. It begins with a professionally machined block, bored to fit next oversized pistons, ensuring clean tolerances and better long-term sealing. Inside, you'll find all new OEM-equivalent pistons, rings, bearings, and gaskets that exceed factory specifications. The forged Callies crankshaft delivers superior strength and durability, especially under high load or high mileage conditions. Cylinder heads are resurfaced, magnafluxed, and rebuilt with new guides, valves, and stem seals to support clean combustion and reduce oil consumption. DFC also includes a full top-end gasket kit and pre-set valvetrain components to speed up installation and ensure consistent performance. Their advanced Rottler machining process, along with upgrades like a Woodruff keyed camshaft and custom doweled oil pump gear, helps eliminate common failure points. The result is a long block that’s reliable, rebuild-strong, and ready for real-world use.

Fits: 2007.5, 2008, 2009, 2010 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LMM

Notes:

• Designed for 2007.5–2010 6.6L Duramax LMM engines
• Fits GM/Chevrolet 2500HD, 3500HD, and TopKick models
• Equipped with a forged Callies crankshaft upgrade
• Street Series is ideal for daily use and light towing
• Engine is a long block configuration, not a full crate engine
• Fuel system, turbocharger, and electrical components are not included
• All valvetrain components are pre-set to factory specifications
• Includes complete short block and remanufactured cylinder heads
• Comes with full top-end gasket kit for final assembly
• Core return may be required to complete the purchase
• Professional installation is highly recommended for best results
• Warranty covers 5 years or 160,000 kilometers with proper installation

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.