DFC Diesel SS660607LBZSOALBCC Street Series Speed Of Air Long Block - Callies Crankshaft (Standard/Auto) | 2006-2007 GM/Chevrolet 2500HD/3500HD 6.6L Duramax LBZ

Features:

• 5-year/160,000 km warranty coverage
• Equipped with Callies forged steel crankshaft
• Total Seal gapless piston rings included
• ARP or OptiTorque head studs installed
• EDM doweled oil pump gear for durability
• Woodruff keyed camshaft for secure fitment
• 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
• Complete top-end gasket kit included

Take Your Duramax To The Next Level

If you want a serious step up in strength and performance for your 2006-2007 GM or Chevrolet 2500HD or 3500HD with the 6.6L Duramax LBZ, this DFC Diesel Street Series Long Block delivers in every way. Built with a Callies forged steel crankshaft, it is designed to handle heavy loads, long hours, and hard driving without flinching. The Street Series is perfect for work trucks, daily drivers, and diesel enthusiasts who demand more than stock can offer. Upgrades like ARP or OptiTorque head studs, Total Seal gapless piston rings, and a precision EDM doweled oil pump gear give you reliability where it counts most. This engine is not just about power, it is about building a foundation you can trust for years. Backed by a 5-year or 160,000 km warranty, you can run it with confidence in everything from cross-country hauls to demanding job site work. Once installed, it is the kind of upgrade that makes your truck feel ready for anything.

Built With Premium Components From Block To Crank

The DFC Diesel SS660607LBZSOALBCC Street Series Long Block starts with a fully remanufactured block, precision machined and bored to accept next over-sized pistons for optimal fit. At its core is a Callies forged steel crankshaft, known for its exceptional strength and long-term durability. All internal components, including pistons, rings, bearings, and gaskets, are brand new and meet or exceed OEM specifications. The cylinder heads are completely remanufactured with new seats, guides, valves, and stem seals, then resurfaced and magnafluxed to ensure flawless sealing and strength. Rockers and pushrods are preset to exact factory specifications for smooth operation from the moment you fire it up. Advanced Rottler machining technology ensures precise tolerances throughout the build, while upgraded gasket sealing methods help prevent leaks in known trouble areas. A complete top-end gasket kit is included, giving you everything you need to complete a clean, reliable installation.

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

Notes:

• Designed for 2006-2007 GM/Chevrolet 2500HD and 3500HD with 6.6L Duramax LBZ
• Street Series is DFC’s flagship build for performance and reliability
• Equipped with a Callies forged steel crankshaft for added strength
• 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 a complete top-end gasket kit for installation
• Backed by a 5-year / 160,000 km manufacturer 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.