DFC Diesel SS6607510LMMTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2007.5-2010 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LMM TOPKICK

Features:

• Backed by 5-year, 160,000 km warranty
• Built for Duramax LMM 2007.5–2010 models
• Compatible with 2500HD, 3500HD, and TopKick
• Includes complete long block and gasket kit
• All-new pistons, rings, and bearings installed
• Rebuilt heads with new valves and guides
• High-performance Total Seal piston rings
• ARP or OptiTorque head studs included
• Custom EDM doweled oil pump gear
• Woodruff keyed camshaft for added strength
• Factory-spec pushrods and rockers pre-set
• Professionally machined using Rottler equipment

Give Your Duramax The Second Life It Deserves

When your 2007.5 to 2010 Duramax-powered 2500HD, 3500HD, or TopKick starts losing power, burning oil, or showing its age, it might be time for more than just a quick fix. The DFC Diesel Street Series Long Block gives you a solid, reliable foundation to build your truck back stronger than stock. Whether you're daily driving, hauling heavy loads, or just want peace of mind on long runs, this engine is built to handle it. It comes with upgraded components in all the right places, including ARP or OptiTorque head studs and high-performance Total Seal piston rings that offer better compression and less blow-by. Every long block is assembled with care, using all-new pistons, bearings, and gaskets to ensure long-lasting durability and clean operation. Plus, DFC backs it all with a 5-year, 160,000-kilometer warranty, giving you serious confidence when you're out on the road or deep into a job. If your current motor's tapped out, this long block is a smart, ready-to-go upgrade you won’t regret.

Built With Precision And Backed By Proven Performance

Every detail of the DFC Diesel SS6607510LMMSOALB Street Series Long Block is engineered with long-term durability and OEM-grade accuracy in mind. The block is professionally machined and bored to accept next over-sized pistons, ensuring a clean fit and proper cylinder sealing. All internal components are brand new or fully reconditioned to meet or exceed original factory specs. This includes new rings, bearings, valves, guides, and stem seals for dependable combustion and oil control. The cylinder heads are resurfaced and magnafluxed to rule out cracks and warping before being rebuilt from the ground up. You'll also get a complete top-end gasket kit and all valvetrain components pre-set to factory specs, making install much more straightforward. DFC even includes a Woodruff keyed camshaft and EDM doweled oil pump gear, adding strength in high-stress areas that often fail in stock builds. From advanced Rottler machining to quality parts selection, this engine is built to outperform and outlast.

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

Notes:

• Engine fits 2007.5–2010 6.6L Duramax LMM applications
• Compatible with GM 2500HD, 3500HD, and TopKick models
• Designed for trucks with standard or automatic transmissions
• Engine comes as a long block only, not a complete drop-in
• Does not include turbocharger, fuel system, or electronics
• All valvetrain components come pre-set to factory specifications
• Core return may be required by the manufacturer
• Warranty valid for 5 years or 160,000 kilometers
• Warranty coverage applies to approved installations only
• Street Series is ideal for daily driving and light towing
• Engine includes upgraded parts to correct common failure points
• Professional installation is highly recommended for best results

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.