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*Built by Callies*
Fits 2001-2016 Chevy / GMC 6.6L Duramax
Callies Durastar crankshafts are designed to be substantially stronger than OEM shafts currently found in GM’s popular Duramax diesel. This improvement is the result of substantially stronger steel, considerably deeper nitride layer and unique machining features.
Durastar crankshafts are intended to be externally balanced with stock damper and flywheel configurations.
Unlike the LB7 stock crank, Callies modified the counterweights on this Durastar Crank to be able to clear and fit in all years with stock rods and pistons.
Optional Dmax Performance Crankshaft Gear: