6604505LLYSOASBCC Speed of Air Short Block (STD/AUTO) Callies Crankshaft

Features:

• Speed of Air piston technology
• Premium Callies crankshaft included
• Professionally machined and bored block
• No cylinder sleeves used
• New name brand internal components
• Components meet or exceed OEM specifications
• Includes front cover with seal
• Includes rear cover with main seal
• Oil pan included
• Complete installation gasket kit included
• Backed by DFC five year warranty
• Fits 2004.5-2005 6.6L Duramax LLY

Build Your LLY Around Strength You Can Trust

When the engine is already coming out of your Duramax, choosing the right short block can make the difference between simply getting the truck running again and building it for years of dependable work. The DFC Diesel 6604505LLYSOASBCC Speed of Air Short Block gives 2004.5-2005 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD owners a carefully prepared foundation featuring Speed of Air technology and a Callies crankshaft. That combination makes this assembly especially appealing for a truck that regularly sees towing duty, demanding workloads, or performance upgrades where a strong rotating assembly matters. DFC professionally machines and bores the block for the next oversized piston rather than relying on cylinder sleeves, helping maintain a consistent approach to the remanufacturing process. New industry recognized name brand components that meet or exceed OEM specifications are used to help provide the quality and consistency you want when investing this deeply into your LLY. The assembly also includes the front cover with seal, rear cover with main seal, oil pan, internal components, and a complete gasket kit for installation, taking some of the parts chasing out of the rebuild process. With DFC backing its engines with a 5 year or 160,000 kilometer warranty, this short block offers a compelling starting point for putting a hardworking Duramax back where it belongs.

Proven Components Create A Stronger Starting Point

The engineering behind this DFC Diesel short block starts with a professionally machined 6.6L LLY Duramax block that is bored to accept the next oversized piston without the use of cylinder sleeves. Its Callies crankshaft provides a premium centerpiece for the rotating assembly, making the internal construction an important consideration for owners who care about strength and long term dependability. This version also incorporates Speed of Air technology, adding a performance focused element to an engine platform already known for producing strong torque and responding well to tuning. DFC uses new pistons, rings, gaskets, and other industry recognized components selected to meet or exceed OEM specifications, helping establish consistent clearances and dependable operation throughout the assembly. The LLY platform itself uses a 6.6L V8 overhead valve architecture and was factory rated at 310 horsepower, giving builders a capable foundation for stock replacement or modified truck applications. Front and rear covers arrive with their respective seals, while the included oil pan and installation gasket kit help provide more of the essential hardware needed when transferring the remaining components from the original engine. Taken together, the precision machining, sleeveless block preparation, Callies crankshaft, and carefully selected internals make this short block a well equipped foundation for bringing a 2004.5-2005 LLY Duramax back into service.

Fitment: 2004.5, 2005 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax LLY

Notes:

• Designed for 2004.5-2005 GM 6.6L Duramax LLY applications.
• This is a short block assembly, not a complete engine.
• Block is machined for the next oversized piston.
• DFC states no cylinder sleeves are used.
• Includes a Callies crankshaft in this configuration.
• Includes front cover with seal.
• Includes rear cover with main seal.
• Oil pan and internal components are included.
• Complete installation gasket kit is included.
• Components meet or exceed OEM specifications.
• Confirm vehicle and engine compatibility before ordering.
• DFC advertises a 5 year 160000km warranty.
• Core Charge: $2,900