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6604505LLYCMP DFC Complete Long Block Engine - GM 6.6L Duramax 2004.5-2005 (LLY Engine Code)

Mftr. Part#: 6604505LLYCMP
Manufacturer: DFC Diesel
2004.5-2005 GM Duramax 6.6L LLY - DFC's Basic Series Complete Long Blocks are built for budget conscious work trucks and daily drivers in mind, comes with important upgrades to key common problem areas, and a 5-year/160,000km warranty throughout North America, they do not include upgraded ARP Cylinder Head Studs pre-installed.

PRODUCT DETAILS (click to expand)

Mftr. Part#6604505LLYCMP

PRODUCT SPECS (click to expand)

Attribute nameAttribute value
Engine SeriesBasic
Includes ARP Head StudsNo



Vehicle 17 Digit VIN Number Is Required.


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Accept Cores Charge $3000 Engine + $500 Crate - View Shipping & Return Policies



  • Standard and Automatic Transmission
  • Most comprehensive 5-year/160,000km (100,000 mile) warranty in North America.
  • DFC exclusive - custom EDM doweled oil pump gear.
  • Woodruff keyed camshaft.
  • In addition to the Complete Long Block, Complete Street Series and Tow/Haul Series are also available.
  • Machined with some of the most advanced ROTTLER machining equipment in North America.
  • Improved gasket sealing methods in common leakage areas.
  • Standard in each long block engine: All new pistons, rings, bearings, gaskets, seals, valves, springs, stem seals and cast guides.
  • Cylinder blocks are blueprinted to tighter tolerances than OEM specifications using their Rottler F69 ATC


  • Long Block Engine
  • Fuel Injectors
  • Turbo Charger
  • Oil Cooler

*CP3 High Pressure Fuel Pump Not Included