Fitment Notes: 2001-2016 GM Duramax 6.6L 
Wagler Callies Billet Crankshaft Internally Balanced for 2001-2016 GM Duramax diesels. Narrowed Rod Journals For Added Crankshaft Strength. Machined from triple heat treated 4330v steel. Dual Damper Keyways. OEM 3.900 Stroke. WCP Rods require no modification for the Callies Crank. WCP Rods are machined specifically for the narrowed Rod Journal. Must have Bob Wights to balance crank. Callies Crank built to WCP Specs. Rods Must be Narrowed if using a factory replacement rod.
Notes:
Does NOT include main bearings or thrust washer set
We recommend sourcing main bearings/thrust washers through your machine shop
Thrust washers should be hand fit for proper clearances prior to assembly by your machine shop
Wagler Callies Billet Crankshaft Internally Balanced Features:
Narrowed Rod Journals For Added Crankshaft Strength
Machined from triple heat treated 4330v steel
Dual Damper Keyways
OEM 3.900 Stroke
WCP Rods require no modification for the Callies Crank
WCP Rods are machined specifically for the narrowed Rod Journal
Must have Bob Wights to balance crank
Callies Crank built to WCP Specs
Rods Must be Narrowed if using a factory replacement rod