DFC Diesel SS660607LBZTKSOALB Street Series Speed Of Air Long Block (Standard/Auto) | 2006-2007 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LBZ TOPKICK

Features:

• 5-year / 160,000 km warranty coverage
• Total Seal gapless piston rings included
• ARP or OptiTorque head studs installed
• EDM doweled oil pump gear for strength
• Woodruff keyed camshaft for secure timing
• Precision machining with advanced Rottler equipment
• Improved gasket sealing in leak-prone areas
• All new pistons, rings, and bearings
• New gaskets, seals, and valve components
• Cylinder heads resurfaced and magnafluxed
• Preset rockers and pushrods to factory specs
• Complete top-end gasket kit included

Give Your Duramax The Strength It Deserves

When you need an engine that can handle the demands of a GM TopKick or Chevy/GMC HD truck, the DFC Diesel SS660607LBZTKSOALB Street Series Long Block is ready for the job. Built with durability in mind, this remanufactured 6.6L Duramax LBZ is far from a basic replacement. It has been upgraded in the areas that matter most, so you can rely on it whether you are hauling construction equipment or making long-distance runs. Key components like ARP or OptiTorque head studs, Total Seal gapless piston rings, and a custom EDM doweled oil pump gear are included to give the engine extra strength and longevity. You get the confidence of a 5-year or 160,000 km warranty, which is among the most comprehensive in the industry. Every part, from the pistons to the gaskets, is brand new and built to meet or exceed OEM specifications. This is the kind of long block that works as hard as your truck does, giving you dependable performance day in and day out.

Built With Precision From Block To Head

The DFC Diesel SS660607LBZTKSOALB Street Series Long Block starts with a professionally machined block that has been bored for next over-sized pistons, ensuring a precise fit and consistent performance. All pistons, rings, bearings, and gaskets are brand new and sourced from trusted OEM or equivalent manufacturers. The cylinder heads are fully remanufactured with new seats, guides, valves, and stem seals, then resurfaced and magnafluxed to guarantee durability and a perfect seal. Rockers and pushrods are preset to exact factory specifications to make installation smoother and to help the engine run right from day one. Advanced Rottler machining technology is used throughout the build process to maintain tight tolerances. DFC also improves sealing methods in common leak-prone areas, helping to reduce downtime and maintenance. Each long block comes complete with a top-end gasket kit so you have what you need to finish the installation with confidence.

Fits: 2006, 2007 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LBZ Topkick

Notes:

• Designed for 2006-2007 GM/Chevrolet 2500HD, 3500HD, and TopKick with 6.6L Duramax LBZ
• Street Series is DFC’s flagship build for performance and reliability
• Engine is a remanufactured long block, not a complete drop-in
• Includes upgrades to address common factory problem areas
• Professionally machined and bored for next over-sized pistons
• Built with all new OEM or equivalent internal components
• Cylinder heads are fully re-manufactured, resurfaced, and magnafluxed
• Rockers and pushrods are preset to factory specifications
• Comes with complete top-end gasket kit for installation
• Backed by a 5-year/160,000 km warranty

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.