Current Lead Times: In Stock Engines Ship Same or Next Day - Out of Stock: 1-3 Weeks on Most Long Block Engines; 3-5 Days on Heads – *call us for more exact lead times for your specific build
The rotating assembly in the 2007–2010 Duramax 6.6L LMM includes the crankshaft, connecting rods, pistons, and flywheel or flexplate—working together to convert combustion force into rotational motion. This core group of components must be precisely balanced and durable to handle high torque and RPM. In performance builds, forged or upgraded parts are often used to withstand increased stress, ensuring smoother operation, greater reliability, and the ability to support higher horsepower.
Building engines the way the OEM factory should have in the first place.
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