DFC Diesel Remanufactured Street Series 6.6 LML/LGH Long Block Crate Engine (W/ Callies Crankshaft)

The DFC Diesel Remanufactured Street Series 6.6 LML Long Block Crate Engine (With Callies Crankshaft) from XDP is designed for diesel enthusiasts who want to replace their Duramax engine with a top-quality remanufactured engine. DFC makes important improvements during the remanufacturing process to ensure reliability, even in high-performance applications. DFC upgrades the Duramax's weak points by adding parts like an EDM oil pump shaft with a hardened dowel and a Woodruff Keyed camshaft to prevent slipping and oil pressure loss. DFC uses Rottler machining equipment for precise tolerances that exceed OEM specifications. DFC carefully inspects every core before the build process and selects only the best ones, rejecting any components that require extensive restoration to maintain the highest standards. 

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. The DFC long block is machined with near identical weight piston and connecting rod assemblies to help you get a smoother running engine that makes less noise and is more balanced.  DFC long blocks include reinforced internals with new pistons, rings, valves, springs, doweled oil pump, bearings, and rods. 

Unlike some other remanufacturing companies in the industry that re-use wearing items like valves and valves guides, DFC replaces each guide with a new cast guide and installs all new valves from high quality sources like MAHLE or SBI in every cylinder head. To address common cracking areas in the cylinder head, DFC machines each head to remove the factory hardened seat material. DFC then installs new SBI valve seats to help eliminate premature cracking, giving you a more durable cylinder head. 

The included Compstar-Durastar crankshaft from Callies features a Deep DuraCase nitride treatment that enhances durability and wear.  Rod journals are drilled for reduced inertia and ease of balance. All journals feature True Form fillet radii and the timing gear is keyed to prevent shearing. These journals are also polished to a 6Ra or finer finish. The stroke is 3.898" with OEM journal diameters and width. Callies constructs this crankshaft through hardened 4340 steel. The damper fit is dual keyed. This crankshaft accepts OEM post and flange bolts in addition to OEM flywheels / flexplates. The main bearing oil holes have lead-ins for enhanced cold start oil flow to rod journals.

Complete short block with the front cover and seal, rear cover with main seal, oil pan, all new internal components, cylinder heads with all rockers and pushrods installed, doweled oil pump gear, woodruff keyed cam shaft, and complete gasket kit for installation.