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USD 6687.35
Part #: DFCKORE660104LB7LB

DFC Diesel Remanufactured KORE Series 6.6 LB7 Long Block Crate Engine

Vehicle Fitment:
2001-2004 GM 6.6L Duramax LB7 (Manual & Automatic) | See full application list below
Part #: DFCKORE660104LB7LB
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The DFC Diesel Remanufactured KORE Series 6.6 LB7 Long Block Crate Engine is an affordable replacement for the failed engine in your 2001-2004 GM 6.6L Duramax LB7 equipped pickup truck. The KORE Series of engines were designed to bridge the gap for Chevy/GMC owners that want a quality engine but are working on a tighter budget. These engines are built to the same high standards and quality of DFC's regular engines and include numerous upgrades to the common failure areas. The KORE Series becomes more cost-effective as they do not include many components that can be re-used from your existing engine, or are easily sourced by the end user.

Engine Remanufacturing
DFC engines are built utilizing some of the most advanced machining equipment in North America. This Rottler equipment helps ensure the engines feature tolerances that are better than OEM specifications. In addition, the Kore Series features all new pistons, rings, bearings, gaskets, seals, valves, springs, hardened seats, stem seals, and cast guides. Engines come standard with Total Seal Gapless Piston Rings and incorporate improved gasket sealing methods in common leakage areas.


DFC engines are remanufactured by diesel enthusiasts for diesel enthusiasts. DFC stands behind the KORE Series of engines with a 1-year Unlimited-Mileage Warranty (Non-Commercial).

DFC 6.6L Long Block Engines Include
Complete short block assembly and gaskets, plus cylinder heads. A complete top end gasket kit is included to finish install.

  • Remanufactured Long Block Crate Engine
  • For Use With Automatic & Manual Transmission
  • Professionally Machined Using Rottler Equipment
  • Comes Standard With Total Seal Gapless Piston Rings
  • Includes All Gaskets & Silicone To Finish Engine Installation
  • Features Improved Gasket Sealing Methods In Common Leakage Areas

New Engine Checklist (Replacement Items, Sold Separately):
Oil Cooler - highly recommended and mandatory if your past engine had a bearing failure.
Injectors - highly recommended especially on higher mileage engines or engines with contaminated fuel.
Turbocharger - recommended if mileage over 125K miles, mandatory if shaft play is present, or if engine was dusted.
Water Pump - highly recommended if engine has over 125K miles.
Evans Waterless Coolant - recommended upgrade to prevent corrosion, boil over, and all-around a better cooling system performance.

Application Notes:
Does not include: front cover, rear cover, oil pump, upper oil pan, lower oil pan, oil pickup tube, rocker arms, pushrods, valve bridges, and other regular items that normally ship with long block engines.
The specific brand of each component may change due to part availability at the time of each build. Parts are chosen at the discretion of DFC and cannot be specially requested. DFC uses only quality components sourced from multiple brands during the remanufacturing process and backs the KORE series engines with a 1-year Unlimited-Mileage Warranty.

2001-2004 Chevrolet Silverado 2500HD/3500HD (6.6 Duramax LB7)
2001-2004 GMC Sierra 2500HD/3500HD (6.6 Duramax LB7)
Shipping Restrictions Apply shipping restriction icon This product can not be shipped to these states/provinces: CA

Note: $500 Crate charge is included in core charge total. Engine shipping crate must be returned with core engine to receive full core credit.


  • MPN KORE660104LB7LB
  • ID 130336
  • Manufacturer Name DFC Diesel
  • Shipping Weight 645.00 lb.
  • Shipping Length 33 in.
  • Shipping Width 44 in.
  • Shipping Height 36 in.
  • Fuel Type Diesel
  • E-Code 4
  • Warranty Info 1 Year / Unlimited Mileage
    View Kore Series Warranty
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Internal L0R0


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